selftest/reproducible: Print error context on failure

selftest/reproducible: Print error context on failure

Printed logs during the reproducible test look like this in case of
failure:
2025-01-12 00:39:00,807 - oe-selftest - INFO - Building reproducibleA (sstate allowed)...
2025-01-12 00:40:08,323 - oe-selftest - ERROR - Bitbake failed! but keep going... Log:
2025-01-12 00:40:08,323 - oe-selftest - INFO - Found ERROR (line 126):
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: recipe opkg-utils-native-0.7.0-r0: task do_populate_sysroot_setscene: Succeeded
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: Running setscene task 74 of 333 (virtual:native:.../poky/meta/recipes-devtools/opkg-utils/opkg-utils_0.7.0.bb:do_recipe_qa_setscene)
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: recipe bash-5.2.37-r0: task do_populate_sysroot_setscene: Succeeded
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: recipe cve-update-nvd2-native-1.0-r0: task do_unpack: Succeeded
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: Running task 4 of 974 (.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb:do_cve_check)
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: recipe bash-5.2.37-r0: task do_packagedata_setscene: Succeeded
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_packagedata_setscene: Started
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: Running setscene task 77 of 333 (.../poky/meta/recipes-extended/bash/bash_5.2.37.bb:do_recipe_qa_setscene)
2025-01-12 00:40:08,323 - oe-selftest - INFO -       NOTE: Running setscene task 78 of 333 (.../poky/meta/recipes-core/ncurses/ncurses_6.5.bb:do_populate_sysroot_setscene)
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_populate_sysroot_setscene: Started
2025-01-12 00:40:08,324 - oe-selftest - INFO -       ERROR: hello-fail-1.0-r0 do_populate_sysroot_setscene: this is an error
2025-01-12 00:40:08,324 - oe-selftest - INFO -       ERROR: hello-fail-1.0-r0 do_populate_sysroot_setscene: Error executing a python function in exec_func_python() autogenerated:
2025-01-12 00:40:08,324 - oe-selftest - INFO -
2025-01-12 00:40:08,324 - oe-selftest - INFO -       The stack trace of python calls that resulted in this exception/failure was:
2025-01-12 00:40:08,324 - oe-selftest - INFO -       File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
2025-01-12 00:40:08,324 - oe-selftest - INFO -            0001:
2025-01-12 00:40:08,324 - oe-selftest - INFO -        *** 0002:do_populate_sysroot_setscene(d)
2025-01-12 00:40:08,324 - oe-selftest - INFO -            0003:
2025-01-12 00:40:08,324 - oe-selftest - INFO -       File: '.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb', lineno: 17, function: do_populate_sysroot_setscene
2025-01-12 00:40:08,324 - oe-selftest - INFO -            0013:}
2025-01-12 00:40:08,324 - oe-selftest - INFO - Found ERROR (line 127):
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: Running setscene task 74 of 333 (virtual:native:.../poky/meta/recipes-devtools/opkg-utils/opkg-utils_0.7.0.bb:do_recipe_qa_setscene)
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe bash-5.2.37-r0: task do_populate_sysroot_setscene: Succeeded
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe cve-update-nvd2-native-1.0-r0: task do_unpack: Succeeded
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: Running task 4 of 974 (.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb:do_cve_check)
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe bash-5.2.37-r0: task do_packagedata_setscene: Succeeded
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_packagedata_setscene: Started
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: Running setscene task 77 of 333 (.../poky/meta/recipes-extended/bash/bash_5.2.37.bb:do_recipe_qa_setscene)
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: Running setscene task 78 of 333 (.../poky/meta/recipes-core/ncurses/ncurses_6.5.bb:do_populate_sysroot_setscene)
2025-01-12 00:40:08,324 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_populate_sysroot_setscene: Started
2025-01-12 00:40:08,324 - oe-selftest - INFO -       ERROR: hello-fail-1.0-r0 do_populate_sysroot_setscene: this is an error
2025-01-12 00:40:08,324 - oe-selftest - INFO -       ERROR: hello-fail-1.0-r0 do_populate_sysroot_setscene: Error executing a python function in exec_func_python() autogenerated:
2025-01-12 00:40:08,325 - oe-selftest - INFO -
2025-01-12 00:40:08,325 - oe-selftest - INFO -       The stack trace of python calls that resulted in this exception/failure was:
2025-01-12 00:40:08,325 - oe-selftest - INFO -       File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
2025-01-12 00:40:08,325 - oe-selftest - INFO -            0001:
2025-01-12 00:40:08,325 - oe-selftest - INFO -        *** 0002:do_populate_sysroot_setscene(d)
2025-01-12 00:40:08,325 - oe-selftest - INFO -            0003:
2025-01-12 00:40:08,325 - oe-selftest - INFO -       File: '.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb', lineno: 17, function: do_populate_sysroot_setscene
2025-01-12 00:40:08,325 - oe-selftest - INFO -            0013:}
2025-01-12 00:40:08,325 - oe-selftest - INFO -            0014:
2025-01-12 00:40:08,325 - oe-selftest - INFO - End of log:
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: Running task 955 of 974 (.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb:do_populate_sysroot)
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_populate_sysroot: Started
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: recipe hello-fail-1.0-r0: task do_populate_sysroot: Succeeded
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: Running noexec task 973 of 974 (.../poky/meta/recipes-core/hello-single/hello-fail_1.0.bb:do_build)
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: Running noexec task 974 of 974 (.../poky/meta/recipes-core/hello-single/hello-norepro_1.0.bb:do_build)
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: Tasks Summary: Attempted 974 tasks of which 958 didn't need to be rerun and all succeeded.
2025-01-12 00:40:08,325 - oe-selftest - INFO -       NOTE: Generating JSON CVE summary
2025-01-12 00:40:08,325 - oe-selftest - INFO -       Complete CVE JSON report summary created at: .../poky/build-master-st/reproducibleA/tmp/log/cve/cve-summary.json
2025-01-12 00:40:08,325 - oe-selftest - INFO -
2025-01-12 00:40:08,325 - oe-selftest - INFO -       Summary: There were 2 ERROR messages, returning a non-zero exit code.
2025-01-12 00:40:08,326 - oe-selftest - ERROR - reproducibleA build failed. Trying to compute built packages differences but the test will fail.

Fixes [YOCTO #15655] (second half).

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>