fix: Helm-addon irsa_config default value for create_namespace condition

[sebolabs]

What does this PR do?

With 4.12 the default value of the irsa_config variable was changed from null to {} while the value of the create_namespace property within the resource "helm_release" "addon" was not updated and remained as:

var.irsa_config != null ? false : try(var.helm_config["create_namespace"], false)

The correct value should be:

var.irsa_config != {} ? false : try(var.helm_config["create_namespace"], false)

Versions comparison: v4.11.0...v4.12.0#diff-08ec4987c7b396bd22851dba98a35f66754059cbc09e6f88a0801533f8d03946R33

Motivation

I was using v4.11.0, updated to v4.12.0, and spotted that the create_namespace value I wasn't overriding was suddenly changed from the default true to false.

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I have added a new example under examples to support my PR
• Yes, I have created another PR for add-ons under add-ons repo (if applicable)
• Yes, I have updated the docs for this feature
• Yes, I ran pre-commit run -a with this PR

Note: Not all the PRs require a new example and/or doc page. In general:

• Use an existing example when possible to demonstrate a new addons usage
• A new docs page under docs/add-ons/* is required for new a new addon

For Moderators

• E2E Test successfully complete before merge?

Additional Notes

Got:

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration and found no differences, so no changes are needed.

Instead of:

Terraform will perform the following actions:

  # module.eks_addons.module.argocd[0].module.helm_addon.helm_release.addon[0] will be updated in-place
  ~ resource "helm_release" "addon" {
      ~ create_namespace           = true -> false
        id                         = "argo-cd"
        name                       = "argo-cd"
        # (28 unchanged attributes hidden)

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.