[Bug] Modules fail validation for AWS

[bzarboni1]

ISSUE

When running the bootstrap layer for AWS, the following error is encountered:

$ terraform plan
╷
│ Error: Invalid value for variable
│ 
│   on main.tf line 50, in module "github_foundations":
│   50:   oidc_configuration = local.oidc_configuration
│     ├────────────────
│     │ var.oidc_configuration.azure is null
│     │ var.oidc_configuration.custom is null
│     │ var.oidc_configuration.gcp is null
│ 
│ At least one oidc_configuration must be set.
│ 
│ This was checked by the validation rule at
│ .terraform/modules/github_foundations/modules/github-foundations/variables.tf:91,3-13.

The validation does not currently support aws.