Change log for GCP_IAM_ANALYSIS

Date Changes
2023-02-27 Bug-Fix:
- Removed mapping of field 'iamBinding.members' to 'entity.user.group_identifiers'.
2022-12-28 Enhancement:
- Mapped the field 'iamBinding.role' to 'entity.user.attribute.role.name'.
- Mapped the field 'iamBinding.members' to 'entity.user.group_identifiers'.
2022-07-27 Enhancement
- Removed the mapping for "identity.product_object_id" which was mapped to "event.idm.entity.entity.user.userid".