Refactor service agent management (#2423)

* Service agents script

* Service agents update

* WIP

* Update script and terraform

* Fix tests

* Fix linter

* Update docs

* Bring back pf example inventory

* Fix tests

* Fix more tests

* Fix tests

* Use dataclasses for build_service_agents.py

* Remove unneeded field() from build_service_agents

* Re-enable CMEK depends_on in project outputs

* Update tools/requirements.txt

* Enable storage in GCS example projects

* Fix tests

* Add CMEK Service Agents dependencies for services

* Fix typos and data platform cmek

* More typos

CONTRIBUTING.md

@@ -165,8 +165,8 @@ module "project" {
     "constraints/compute.skipDefaultNetworkCreation" = true
   }
   service_encryption_key_ids = {
-    compute = [local.kms.europe-west1.compute]
-    storage = [local.kms.europe.gcs]
+    "compute.googleapis.com" = [local.kms.europe-west1.compute]
+    "storage.googleapis.com" = [local.kms.europe.gcs]
   }
   shared_vpc_service_config = {
     attach       = true