toaster: Show 'not applicable' for default project machine and release

toaster: Show 'not applicable' for default project machine and release

The machine and release for the default project should show as
'not applicable' on the all projects page, as that information
isn't available for command-line builds.

Modify the templates with some conditionals to check for the
default project row, plus some data-* attributes to mark
where that data is to make testing possible.

Add some tests for the all projects page to ensure that
the correct machine/release are still shown for non-default projects,
and 'not applicable' for the default project.

[YOCTO #8231]

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: brian avery <avery.brian@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>