packaging: move check-compat-strings.sh to tests/testlib/
Since we're not including contrib/ in pip packages, this test failed when trying to run not from evolve repo.
--HG-- branch : stable
All legacy (hg-git based) Projects have been automatically migrated to native with the upgrade of 2025-01-23
Since we're not including contrib/ in pip packages, this test failed when trying to run not from evolve repo.
--HG-- branch : stable