OCPBUGS-54302: Add Key Rings list permission for gcp

** After adding https://issues.redhat.com/browse/OCPBUGS-52203, the permission
`cloudkms.keyRings.list` is required when a user provides at least one kms key in the installconfig
under compute, control plane, or default machine. The permission is required because the key rings must
be searched and returned then compared to the key ring that the user provides for validation.

Author: barbacbd

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

@@ -194,6 +194,12 @@ If your organization’s security policies require a more restrictive set of per
 * `iam.serviceAccounts.signBlob`
 ====
 
+.Required permissions when providing Key Management Service (KMS) key rings
+[%collapsible]
+====
+* `cloudkms.keyRings.list`
+====
+
 .Optional Images permissions for installation
 [%collapsible]
 ====

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

@@ -193,6 +193,12 @@ If your organization’s security policies require a more restrictive set of per
 * `iam.serviceAccounts.signBlob`
 ====
 
+.Required permissions when providing Key Management Service (KMS) key rings
+[%collapsible]
+====
+* `cloudkms.keyRings.list`
+====
+
 .Required Images permissions for installation
 [%collapsible]
 ====