Cache charmcraft pack container, skip unstable tests except on schedule

[carlcsaposs-canonical]

Ported from canonical/mysql-k8s-operator#146

[codecov]

Codecov Report

Merging #69 (dea7ba6) into main (f4b372b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #69   +/-   ##
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  Coverage   68.52%   68.52%           
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  Files           7        7           
  Lines         950      950           
  Branches      142      142           
=======================================
  Hits          651      651           
  Misses        270      270           
  Partials       29       29           

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[dragomirp]

Might be best to label the HA tests as unstable for the time being.

[carlcsaposs-canonical]

Marked HA tests as unstable in a29b6e7

[marceloneppel]

LGTM! Thanks Carl!

[dragomirp]

LGTM, but CI linting complains: https://github.com/canonical/postgresql-operator/actions/runs/4204848471/workflow and I can't see the test results when I go to the PRs checks.

[carlcsaposs-canonical]

LGTM, but CI linting complains: https://github.com/canonical/postgresql-operator/actions/runs/4204848471/workflow and I can't see the test results when I go to the PRs checks.

That was caused by an issue with the data-platform-workflows release that I manually fixed (and opened a PR to fix in the future: canonical/data-platform-workflows#11)

Re-triggered the tests to use the correct release of data-platform-workflows