oeqa/selftest/resulttool: fix ptest filtering tests

oeqa/selftest/resulttool: fix ptest filtering tests

There are multiple issues with the tests for the ptest fixup mechanism
introduced in c45d58f003e8d8b323169ca9d479dc49c43a9974:
- the feature does not impact regression.can_be_compared but directly the
  comparison step in regression.regression_common
- the "status" field was wrong ("STATUS"), which prevents tests comparison
- there is a typo babeltrace2 ptest result name

Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>