Feat/external secrets irsa

[Pacobart]

What does this PR do?

Adds support for IRSA creation for external-secrets helm deployment.

To use, add secret arn's list and pass via external_secrets_secrets_manager_arns to submodule

module "eks_addons" {
  enable_external_secrets        = true
  external_secrets_secrets_manager_arns = ["secret_arn_here"]
  external_secrets_ssm_parameter_arns = ["secret_arn_here"]
  external_secrets_helm_config = {}
}

Motivation

Missing feature blocking us from using aws-eks-blueprints provided submodule

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 required examples and docs except a new pattern or add-on added.

For Moderators

• E2E Test successfully complete before merge?

Additional Notes

[bryantbiggs]

thank you - once you fix the CI checks (trailing new line) everything should be green