Merge branch 'jc/fix-tap-output-under-bash'

A recent attempt to make the test output nicer to view on CI systems broke TAP output under bash. The effort has been reverted to be re-attempted in the next cycle. * jc/fix-tap-output-under-bash: Revert "tests: when run in Bash, annotate test failures with file name/line number" Revert "ci: add a problem matcher for GitHub Actions" Revert "t/test_lib: avoid naked bash arrays in file_lineno"