Manually prompt Gdrive authentication step

To trigger the auth without pushing/pulling, one can run dvc status -c.

To find and remove broken credentials to be able to reauth. Find and remove:

$CACHE_HOME/pydrive2fs/{gdrive_client_id}/default.json (unless profile is specified), where the CACHE_HOME location per platform is:

macOS Linux (*typical) Windows
~/Library/Caches ~/.cache %CSIDL_LOCAL_APPDATA%

Location of this file can be customized with gdrive_user_credentials_file: remote modify