feat(misconf): resolve tf module from OpenTofu compatible registry

[nikpivkin]

OpenTofu has its own module and provider registry with the same HTTP API as Terraform, except for the endpoint response to a module download. OpenTofu returns a response with 200 status code and a body that contains the location of the module. But in some cases the response may be the same as Terraform.

curl https://registry.opentofu.org/v1/modules/terraform-aws-modules/s3-bucket/aws/4.1.2/download
{
  "location": "git::https://github.com/terraform-aws-modules/terraform-aws-s3-bucket?ref=v4.1.2"
}%

cat main.tf
module "bucket" {
  source  = "registry.opentofu.org/terraform-aws-modules/s3-bucket/aws"
  version = "= 4.1.2"
}% 

trivy conf . -d
....
2024-05-22T13:38:58+07:00       DEBUG   [misconf] 38:58.632363000 terraform.parser.<root>.evaluator.resolver Resolving module 'module.bucket' with source: 'registry.opentofu.org/terraform-aws-modules/s3-bucket/aws'...
2024-05-22T13:38:58+07:00       DEBUG   [misconf] 38:58.632389000 terraform.parser.<root>.evaluator.resolver Trying to resolve: cc0c14b7c898f35f408c748e32f7784c
2024-05-22T13:38:58+07:00       DEBUG   [misconf] 38:58.632409000 terraform.parser.<root>.evaluator.resolver no token was found for the registry at registry.opentofu.org
2024-05-22T13:38:58+07:00       DEBUG   [misconf] 38:58.632412000 terraform.parser.<root>.evaluator.resolver Requesting module versions from registry using 'https://registry.opentofu.org/v1/modules/terraform-aws-modules/s3-bucket/aws/versions'...
2024-05-22T13:38:59+07:00       DEBUG   [misconf] 38:59.692377000 terraform.parser.<root>.evaluator.resolver Found version '4.1.2' for constraint '= 4.1.2'
2024-05-22T13:38:59+07:00       DEBUG   [misconf] 38:59.692447000 terraform.parser.<root>.evaluator.resolver Requesting module source from registry using 'https://registry.opentofu.org/v1/modules/terraform-aws-modules/s3-bucket/aws/4.1.2/download'...
2024-05-22T13:38:59+07:00       DEBUG   [misconf] 38:59.921330000 terraform.parser.<root>.evaluator Failed to load module "unexpected status code: 200". Maybe try 'terraform init'?
....