Bump google-cloud-bigquery from 3.25.0 to 3.30.0 in /src (#4039)

Bumps [google-cloud-bigquery](https://github.com/googleapis/python-bigquery) from 3.25.0 to 3.30.0.
- [Release notes](https://github.com/googleapis/python-bigquery/releases)
- [Changelog](https://github.com/googleapis/python-bigquery/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-bigquery@v3.25.0...v3.30.0)

---
updated-dependencies:
- dependency-name: google-cloud-bigquery
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

src/requirements.txt

@@ -8,5 +8,5 @@ sqlfluff==3.3.0
 
 # sql/util/* dependencies
 pandas==2.2.3
-google-cloud-bigquery==3.25.0
+google-cloud-bigquery==3.30.0
 requests==2.32.3