Add additional test cases

[woop]

The current test suite still lacks integration test coverage in some areas. Let's use this issue to track known gaps.

• Go SDK
• Java SDK
• Python SDK
• GCS staging test

[algattik]

#769 introduced a bug, which was not picked up by UTs:

feast/sdk/python/feast/staging/storage_client.py

Line 119 in 4da4b23

return [f"{S3}://{bucket}/{path.lstrip('/')}"]

should be

return [f"{GS}://{bucket}/{path.lstrip('/')}"] 

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.