Update GoogleDriveLoader to allow bring your own credentials

[jeffbryner]

issue: #168

PR Description

• Where "package" is genai, vertexai, or community
• Use "docs: ..." for purely docs changes, "templates: ..." for template changes, "infra: ..." for CI changes
• Example: "community: add foobar LLM"
  Adds 'bring your own credentials' to the drive loader to allow more flexibility in deployments (cloud run service accounts, command line, jupyter notebooks, colab, etc).

PR Description and Relevant issues:

• Allows for declaration of credentials created elsewhere (outside this module) to be used
• Relevant issues [(Port randomness)](issue: GoogleDriveLoader creates random ports #168)
• Any dependencies required for this change: None

Adds 'bring your own credentials' to the drive loader to allow more flexibility in deployments (cloud run service accounts, command line, jupyter notebooks, colab, etc).

Relevant issues

Fixes issue: #168

🐛 Bug Fix
🧹 Refactoring

Testing(optional)

Tested in jupyter notebook

[lkuligin]

nits: maybe we could move it a few lines up to avoid a not needed Credentials.from_authorized_user_file execution?

[jeffbryner]

My thought was the other options wouldn't be called since they don't/wouldn't exist if you just pass in credentials? i.e. I'd set it on init to only use credentials and no other option:

drive_loader = GoogleDriveLoader(credentials=credentials, folder_id='someid', recursive=True)

[lkuligin]

ok, but what if smbd sends the token_path also?
it's not crucial, the important thing is that linter is failing, please take a look

P.S. https://github.com/langchain-ai/langchain-google?tab=readme-ov-file#local-development-dependencies describes how to run a linter locally if you wish.

[jeffbryner]

OK, looks like trailing spaces. Fixed.