CI: only run backend lints once, not in all test environments

[akx]

Description

No need to spend cycles running lints multiple times; just run it once in a separate step.

Checklist:

• I have performed a self-review of my own code
• I have added a short summary of my change to the CHANGELOG.md
• My code follows the style guidelines of this project
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[gradio-pr-bot]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-3960-all-demos

[abidlabs]

Hi @akx thanks yet again! This change looks fine to me, but let's run linting before we run the tests. Linting is much faster than running the tests, so better for it to fail quickly if the code is not linted rather than having to wait for all of the tests to run

[akx]

@abidlabs @freddyaboulton Done deal. client-test needs client-lint, test needs lint now.

[freddyaboulton]

Thanks @akx !

[freddyaboulton]

Can't update the branch and merge @akx - please merge in main and let me know so we can merge this in.

[akx]

@freddyaboulton Rebased, tests were flaky so I re-pushed, we'll see...

[freddyaboulton]

Hi @akx - can you reopen the PR and allow edits from maintainers? That way I can merge in main and get this merged! Otherwise might be tricky to align on timing

[akx]

@freddyaboulton Sorry, enabled "allow edits" now and rebased.

[freddyaboulton]

Thanks again @akx !

[abidlabs]

Thanks @akx for addressing the feedback!