403 Forbidden Error when downloading chromedriver from self-hosted GitHub Action runner

**Describe the bug**
403 Forbidden error when downloading `chromedriver` via automated self-hosted GitHub Action runner.

**To reproduce**
```
curl https://storage.googleapis.com/chrome-for-testing-public/136.0.7103.94/linux64/chrome-linux64.zip

AccessDeniedAccess denied.We're sorry, but this service is not available in your location
```

**Expected behavior**
To download ok. This started happening a few days ago?

Start by running the reported curl command from the self-hosted GitHub Actions runner and compare its location and response with another environment. Trace the chromedriver download path and identify whether the 403 is caused by the runner environment or the external storage service; done means the cause and a supported resolution are established.

Written by the indexing model from the issue text.