Add new fields to release metadata, fix issue with test suite

[danielskowronski]

1. Add new computed fields to helm_release.metadata:
   • last_deployed to implement Improve metadata attribute by adding last deployed date #1374
   • first_deployed and notes to extend functionality further
2. Fix issue with tests that are using exec.Command to call helm CLI directly - they were expecting kubeconfig to be at $KUBECONFIG, which may not be the same as $KUBE_CONFIG_PATH. The latter is explicitly expected by test suite for Terraform part.

Description

Exposes more metadata about Helm release to extend the possibilities of other resources to act upon release changes. Additionally, provide primitive output from Helm deployment (rendered templates/NOTES.txt if available), which can be used with some bootstrap process.

In other words - adding missing data exposed by Helm.

Acceptance tests

• Have you added an acceptance test for the functionality being added?

Release Note

Release note for CHANGELOG:

- add new attributes to helm_release.metadata: last_deployed, first_deployed, notes
- fix uses of helm CLI in tests: explictly use $KUBE_CONFIG_PATH

References

• https://pkg.go.dev/helm.sh/helm/v3@v3.13.2/pkg/release#Info

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

[hashicorp-cla-app]

All committers have signed the CLA.

[appilon]

This looks good overall just need a few things changed to get it merged!

• Could you rebase to fix the conflicts in the go.mod/go.sum files
• Please add a file in .changelog/PRnumber.txt that details the change, you can see the most recent one as an example

[appilon]

Since this PR was so well done I'm going to take the liberty of getting the PR unblocked.