group_hooks and project_hooks: missing webhook event fields
## Summary
Several webhook event fields documented in the GitLab REST API are missing from the `GroupHook`/`ProjectHook` response structs and/or their Add/Edit options structs.
## Missing fields
### `ProjectHook`
| Field | `ProjectHook` struct | `AddProjectHookOptions` | `EditProjectHookOptions` |
|---|---|---|---|
| `resource_deploy_token_events` | missing | present | present |
The field can be set via Add/Edit but is silently dropped when deserializing the API response.
### `GroupHook`
| Field | `GroupHook` struct | `AddGroupHookOptions` | `EditGroupHookOptions` |
|---|---|---|---|
| `repository_update_events` | present | missing | missing |
| `service_access_tokens_expiration_enforced` | missing | missing | present |
`repository_update_events` is returned in API responses but cannot be set. `service_access_tokens_expiration_enforced` can be set via Edit but is dropped on read and
unavailable via Add.
## References
- [Project webhooks API](https://docs.gitlab.com/api/project_webhooks/) — lists `resource_deploy_token_events` as a writable parameter
- [Group webhooks API](https://docs.gitlab.com/api/group_webhooks/) — lists `repository_update_events` and `service_access_tokens_expiration_enforced` as writable
parameters
## Proposed fix
- Add `ResourceDeployTokenEvents bool` to `ProjectHook`
- Add `RepositoryUpdateEvents *bool` to `AddGroupHookOptions` and `EditGroupHookOptions`
- Add `ServiceAccessTokensExpirationEnforced *bool` to `AddGroupHookOptions`
- Add `ServiceAccessTokensExpirationEnforced bool` to `GroupHook` (readable)
issue