1) Updated code coverage workflow with required changes so that we point to
Codecov onwards for coverage stats.
2) Updated README.md file so that badge for Code Coverage, points to CodeCov
coverage stats for PGSM.
3) Added .DS_STORE to .gitignore file.
This commit contains following,
1) Regression jobs are enabled against Percona PG distribution for version postgresql 11~14.
2) Regression job is enabled against PGDG PG distribution for version postgresql 14.
3) GH actions names for some of the jobs are changed to clear the clutter in GH repo's action page.
Naeem Akhter
Hamid Akhtar
Kai Wagner
Naeem Akhter