feat(argocd): add insecure parameter for argocd apps

[ayeks]

What does this PR do?

Added the optional insecure parameter for argocd apps. If you do not set the insecure parameter it will set to false by default. This does not break existing configurations.

Motivation

When using private repositories in private networks you often do not want to manage the public server certificates in addition to the private ones. The risk is very low that a man-in-the-middle attack is performed. Therefore I added the insecure parameter which can be set when creating an Argo app.

Argo Docs on the insecure flag: https://argo-cd.readthedocs.io/en/stable/user-guide/private-repositories/#self-signed-untrusted-tls-certificates

This parameter resolves repo server errors like error testing repository connectivity: ssh: handshake failed.

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
  • not required in my opinion because its just a minor optional variable
• [ ] Yes, I have created another PR for add-ons under add-ons repo (if applicable)
  • no change in the add-ons section
• 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

Test report:

My config:

module "eks_blueprints_kubernetes_addons" {
  source = "github.com/aws-ia/terraform-aws-eks-blueprints//modules/kubernetes-addons?ref=v4.2.1"
  ...
  argocd_applications = {
    argo-app = {
      path                = var.path
      repo_url            = var.repo_url
      create_namespace    = true
      add_on_application  = true
      ssh_key_secret_name = var.ssh_key_secret_name
      insecure            = true    
    }
  }
}

ArgoCD Repo Server Logs:

time="2022-07-01T06:31:32Z" level=info msg="finished unary call with code OK" grpc.code=OK grpc.method=TestRepository grpc.request.deadline="2022-07-01T06:32:32Z" grpc.service=repository.RepoServerService grpc.start_time="2022-07-01T06:31:32Z" grpc.time_ms=392.957 span.kind=server system=grpc

[bryantbiggs]

Seems reasonable, thanks for the PR @ayeks 🎉