LORAX_USE_GLOBAL_HF_TOKEN to be applied correctly even though request doesn't have api_token

[monologg]

What does this PR do?

Fixes #541 (issue)

Before submitting

• [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [ ] Was this discussed/approved via a Github issue or the discord / slack channel? Please add a link to it if that's the case.
• [ ] Did you write any new necessary tests?

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag members/contributors who may be interested in your PR.