Init Terraform code for managing AWS SSO

[JuicyASen]

Summary

The initialisation of access-contorl with AWS identity Center(SSO). This PR does not contain the workflow setup, that will be implemented later on.

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Details

The code depends on tf module terraform-aws-iam-identity-center

• Manage groups in identity centre
• Manage users in identity centre
  • This will allow users(devs) to add their details in terraform code and raise PR for approval
• Manage permission sets in identity centre
  • Assign permission set to groups

Testing

I have tested terraform code locally, see identity centre resources with tag {ManagedBy: Terraform}. I will destroy them once we are ok with the result and let github action to run the terraform apply with backend managed in s3 bucket

• user provision ✔
• group provision ✔
• permission set provision ✔
  • permission assignment ❓ yet to be verified