Merge pull request #92677 from openshift-cherrypick-robot/cherry-pick-92564-to-enterprise-4.13

[enterprise-4.13] OSDOCS-10620 adding signBlob to 4.12-4.14

Author: bscott-rh

modules/minimum-required-permissions-ipi-gcp.adoc

@@ -171,6 +171,12 @@ For more information, see "Required roles for using passthrough credentials mode
 * `iam.roles.get`
 ====
 
+.Required permissions when authenticating without a service account key
+[%collapsible]
+====
+* `iam.serviceAccounts.signBlob`
+====
+
 .Optional Images permissions for installation
 [%collapsible]
 ====