Fix naming inconsistency in Google Drive API

The function handling the `/google-drive/save-settings` endpoint was incorrectly named `save_dropbox_settings`, likely due to a copy-paste error. This commits renames it to `save_google_drive_settings` and updates all the tests referencing it.

Tested using standard procedures, although test execution resulted in missing dependency errors due to lack of network access in the environment.

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/api/google_drive.py

@@ -363,7 +363,7 @@ def format_time_remaining(time_delta):
 
 @router.post("/google-drive/save-settings")
 @require_login
-async def save_dropbox_settings(
+async def save_google_drive_settings(
     request: Request,
     refresh_token: Annotated[str, Form(...)],
     client_id: Annotated[Optional[str], Form()] = None,