Make project iam viewer name consistent with GCP naming (#2694)

* Make project iam viewer name consistent with GCP naming

* Fix tests

fast/stages/0-bootstrap/data/custom-roles/project_iam_viewer.yaml

@@ -1,4 +1,4 @@
-# Copyright 2023 Google LLC
+# Copyright 2024 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
 # yaml-language-server: $schema=../../schemas/custom-role.schema.json
 # this is used by the plan-only admin SA
 
-name: projectIAMViewer
+name: projectIamViewer
 includedPermissions:
 - iam.policybindings.get
 - iam.policybindings.list