Set group labels via CloudIdentity API

[RA198DFE]

Feature:
Add support for to set group labels via Cloud Identity API (groups.patch method) https://cloud.google.com/identity/docs/reference/rest/v1/groups/patch

Use case:
Controlling access to sensitive data or Admin roles with security groups. To achieve this, the Google Workspace group must have the security label applied. Currently this isn't possible Admin SDK API and tools that use this API exclusively.

Security labelled groups can be applied to Admin Roles, which reduces management overheads of onboarding admin users, as use can simply be added to groups , as opposed to each admin role directly.

Detail:
Setting Group labels is currently not possible with the Admin SDK API, as it lacks support for labels in the groups API.