feat: add pre-commit check in ci

- add a ci workflow to verify pre-commit passes
- fix pre-commit errors/warnings:
  - missing required_version
  - missing required_providers
  - fixed terraform_deprecated_interpolation
  - removed terraform_unused_declarations

modules/vault_cluster/modules/auth_approle_backend/main.tf

@@ -8,4 +8,4 @@ resource "vault_auth_backend" "approle" {
     max_lease_ttl      = var.max_lease_ttl
     listing_visibility = var.listing_visibility
   }
-}
+}