HDDS-11540. Use git submodules for Chart Actions

[dnskr]

What changes were proposed in this pull request?

The PR fixes usage of GitHub Actions needed for the chart testing.
Similar to apache/superset#14211 and apache/superset#12709

Commands used to add submodules:

git submodule add --force https://github.com/helm/chart-testing-action .github/actions/chart-testing-action
cd .github/actions/chart-testing-action
git checkout e6669bcd63d7cb57cb4380c33043eebe5d111992

git submodule add --force https://github.com/helm/kind-action .github/actions/kind-action
cd .github/actions/kind-action
git checkout 0025e74a8c7512023d06dc019c617aa3cf561fde

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-11540

How was this patch tested?

Tested in the fork repo with restricted actions:

• HDDS-11540. Use git submodules for Chart Actions dnskr/ozone-helm-charts#4
• https://github.com/dnskr/ozone-helm-charts/actions/runs/11203122957/job/31140012229?pr=4

[dnskr]

@adoroszlai Please review when you have time.

[adoroszlai]

Thanks @dnskr for the patch.

I noticed a mismatch in submodule commit hashes:

1. PR description, .gitmodules match previous state of test.yaml:
   • chart-testing-action: e6669bcd63d7cb57cb4380c33043eebe5d111992
   • kind-action: 0025e74a8c7512023d06dc019c617aa3cf561fde
2. .github/actions (as shown in PR) and checkout log refer to the current HEAD in the source repos:
   • chart-testing-action: 5aa1c68405a43a57240a9b2869379324b2bec0fc
   • kind-action: 5d66646e5edb36c6b25badc52b0b19936b5fad66

It's OK to add the latest commits instead of those that used to be latest acouple of months ago. But I'd like to know the source of this mismatch, and whether the submodules are actually pinned or not.

[dnskr]

@adoroszlai Thank you for the review.
I made a mistake because I never used git submodules before. Great that you found the issue.
I fixed commit hashes (and description) for submodules and know the submodules point to pinned action versions.

[adoroszlai]

Thanks @dnskr for updating the patch, LGTM.