Strongly recommended for the best service experience. If [upd
ate_mask][google.cloud.talent.v4beta1.UpdateTenantRequest.upd
ate_mask] is provided, only the specified fields in [tenant][
google.cloud.talent.v4beta1.UpdateTenantRequest.tenant] are
updated. Otherwise all the fields are updated. A field mask
to specify the tenant fields to be updated. Only top level
fields of Tenant are
supported.