Merge branch 'ps/t7527-fix-tap-output'

A recent regression in t7527 that broke TAP output has been fixed, some other test noise that also broke TAP output has been silenced, and 'prove' is now configured to fail on invalid TAP output to prevent future regressions. * ps/t7527-fix-tap-output: t: let prove fail when parsing invalid TAP output t/lib-git-p4: silence output when killing p4d and its watchdog t/test-lib: silence EBUSY errors on Windows during test cleanup t7810: turn MB_REGEX check into a lazy prereq t7527: fix broken TAP output ci: unify Linux images across GitLab and GitHub gitlab-ci: add missing Linux jobs gitlab-ci: rearrange Linux jobs to match GitHub's order