Fix configuration differences

What does this MR do and why?

This MR fixes all additional differences in configuration against access_data.yml and cloud_connector.yml

The diff generated via AvailableServicesGenerator can be viewed here.

Note: the explain_code is no longer available via vertex_ai proxy and can be removed :https://log.gprd.gitlab.net/app/r/s/okTn5

References

Please include cross links to any resources that are relevant to this MR. This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.