[Gemini] Migrate Python BigQuery off of apitools client - #39087

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: codecov/codecov-action@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to save: Unable to reserve cache with key setup-python-Linux-x64-24.04-Ubuntu-python-3.10.20-pip-ec08e1386987121028e29ffc695a7f33e25d911c8c8159660aba29a9e770c35d. More details: cache write denied: token has no writable scopes

Failed to save: Unable to reserve cache with key tox-Linux-py3.10-875f9432d967c2c45e963901f0a53fa44d67f03169d6d77a01d4740e680da9a9-24e7918d6deb80e7f35c8a28d8af10b347813f8ae4d4302c8a04dcd1e025fa51. More details: cache write denied: token has no writable scopes

Cache reservation failed: cache write denied: token has no writable scopes

Cache reservation failed: cache write denied: token has no writable scopes

Cache reservation failed: cache write denied: token has no writable scopes

Cache reservation failed: cache write denied: token has no writable scopes

Cache reservation failed: cache write denied: token has no writable scopes