Add support for dry-run mode in bridge_service_perimeter module

[ptran32]

TL;DR

Currently the module bridge_service_perimeter doesn't support dry run mode.

When creating it, it creates it under "enforced" mode in GCP UI

Terraform Resources

google_access_context_manager_service_perimeter

Link: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/access_context_manager_service_perimeter

Detailed design

i think using the parameter "use_explicit_dry_run_spec" with a similar logic than regular_service_perimeter could work.

See: https://github.com/terraform-google-modules/terraform-google-vpc-service-controls/blob/master/modules/regular_service_perimeter/main.tf#L214

The end goal would be to create a bridge perimeter in dry-run mode, and also have the ability to enforce it when a user wants to

Additional information

No response