Pull request #1755: PIPE-2996: Cache casarundata in env setup template
Merge in PIPE/pipeline from cache-casarundata-in-env-setup-template to main
* commit '32e17ed444ada97e6cbdf56cfc826e63d8473113':
Remove the redundant `casaconfig` setup again in `test-unit.yml`
Improve `casaconfig/casarundata` setup in the template with GH action caching