Implement state upgrader support for helm_release resource

[jaylonmcshan19-x]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

This PR implements UpgradeState logic for the helm_release resource to ensure compatibility between Terraform state generated with SDKv2 and the Plugin Framework-based schema introduced in v3.0.0. Specifically, it handles the migration of legacy fields that were previously represented using different types or structures.

Addresses #1574

Acceptance tests

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

Release Note

Release note for CHANGELOG:

...

References

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.