Support Helm provider version 3.x

[moko-poi]

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What is the outcome that you are trying to reach?

I would like to use Helm provider version 3.x with this module. Currently, the module has a version constraint that pins the Helm provider to version 2.x (likely >= 2.4.1, < 3.0.0), which was implemented in #453 to address breaking changes. This constraint prevents users from upgrading to Helm provider 3.x in their Terraform projects.

Helm provider 3.x is now the latest major version and includes important bug fixes, performance improvements, and long-term support.

Describe the solution you would like

Update the versions.tf file to support Helm provider version 3.x:

• Remove or update the upper version constraint on the Helm provider
• Test the module for compatibility with Helm provider 3.0+
• Address any breaking changes introduced in Helm provider 3.x
• Update documentation if there are any behavior changes users should be aware of

Example version constraint:

helm = {
  source  = "hashicorp/helm"
  version = ">= 2.4.1"  # or ">= 3.0.0" if dropping support for 2.x
}

Describe alternatives you have considered

Alternative 1: Continue using Helm provider 2.x

• Downside: Missing out on improvements in 3.x, and 2.x will eventually lose support

Alternative 2: Fork the module and modify version constraints

• Downside: Maintenance burden, missing upstream updates

Alternative 3: Use a separate Helm provider configuration outside this module

• Downside: Reduces module functionality, inconsistent infrastructure management

Additional context

• Helm Provider 3.0 Release Notes: https://github.com/hashicorp/terraform-provider-helm/releases/tag/v3.0.0
• Related PR that pinned to 2.x: fix: Pin Helm provider max supported version due to new major provider version breaking changes #453
• Current major version of Helm provider: 3.x (released in 2024)

This change would allow users to take advantage of the latest Helm provider features while maintaining backward compatibility if possible.

[moko-poi]

ref: #472