Fix access token lookup for model downloads

[lstein]

Summary

PR #6132 inadvertently broke the system for submitting access tokens that match the source URL's regular expression. This PR fixes the issue.

Related Issues / Discussions

Nobody seems to have noticed this problem!

QA Instructions

Be sure to set up a civitai or huggingface access token in invokeai.yaml. E.g.:

remote_api_tokens:
- url_regex: huggingface\.co
  token: hf_xyxyxyxyxyxyx
- url_regex: civitai\.com
  token: abcabcabcabc

Then attempt to download a restricted model. It should succeed. If you remove or change the access token in the config, the download should fail.

Merge Plan

Merge when approved.

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• Documentation added / updated (if applicable)

[hipsterusername]

This might suggest we need to better advertise this configuration capability…

[psychedelicious]

Oh this explains a few things. We've had some reports about problems downloading from model hubs. I ran into this recently and assumed civitai changed something, just been downloading models directly and scping them to my host.