Merge pull request #72678 from mletalie/OSDOCS-9897

[OSDOCS-9897]:Remove "IAM" from role names in required GCP roles doc

Author: EricPonvelle

modules/installation-gcp-permissions.adoc

@@ -21,8 +21,8 @@ When you attach the `Owner` role to the service account that you create, you gra
 
 .Required roles for the installation program
 * Compute Admin
-* IAM Role Administrator
-* IAM Security Admin
+* Role Administrator
+* Security Admin
 * Service Account Admin
 * Service Account Key Admin
 * Service Account User