Update GCP Credentials Request manifest of the Cluster Ingress Operator to use new API field for requesting permissions

type GCPProviderSpec struct {
   metav1.TypeMeta `json:",inline"`
   // PredefinedRoles is the list of GCP pre-defined roles
   // that the CredentialsRequest requires.
   PredefinedRoles []string `json:"predefinedRoles"`
   // Permissions is the list of GCP permissions required to
   // create a more fine-grained custom role to satisfy the
   // CredentialsRequest.
   // When both Permissions and PredefinedRoles are specified
   // service account will have union of permissions from
   // both the fields
   Permissions []string `json:"permissions"`
   // SkipServiceCheck can be set to true to skip the check whether the requested roles or permissions
   // have the necessary services enabled
   // +optional
   SkipServiceCheck bool `json:"skipServiceCheck,omitempty"`
} 

gcloud iam roles describe <role_name>

[akhilrane@localhost cloud-credential-operator]$ gcloud iam roles describe roles/iam.roleViewer
description: Read access to all custom roles in the project.
etag: AA==
includedPermissions:
- iam.roles.get
- iam.roles.list
- resourcemanager.projects.get
- resourcemanager.projects.getIamPolicy
name: roles/iam.roleViewer
stage: GA
title: Role Viewer