chore(librarian): onboard to librarian (#287)

* chore: onboard to librarian

* add anchor in changelog

* update version

* remove old files

---------

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: ohmayr

packages/google-cloud-testutils/.github/.OwlBot.lock.yaml

@@ -0,0 +1,10 @@
+image: us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:c8612d3fffb3f6a32353b2d1abd16b61e87811866f7ec9d65b59b02eb452a620
+libraries:
+  - id: google-cloud-testutils
+    version: 1.7.0
+    apis: []
+    source_roots:
+      - .
+    preserve_regex: []
+    remove_regex: []
+    tag_format: v{version}

packages/google-cloud-testutils/.github/.OwlBot.yaml

@@ -1,5 +1,9 @@
 # Changelog
 
+[PyPI History][1]
+
+[1]: https://pypi.org/project/google-cloud-testutils/#history
+
 ## [1.7.0](https://github.com/googleapis/python-test-utils/compare/v1.6.4...v1.7.0) (2025-10-29)