chore: update librarian to version v0.11.0 (googleapis#16854)

Regular update to `librarian` version on weekly cadence.

`generate --all` produced no diffs.

Author: noahdietz

librarian.yaml

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 language: python
-version: v0.10.2-0.20260424173850-5f413ac088a6
+version: v0.11.0
 repo: googleapis/google-cloud-python
 sources:
   googleapis: