#9857 test: Remove Click < 8.2 compatibility workarounds
Pull request opened by edgarrmondragon
## Description
## Checklist
• I have read the contribution guide
### Was generative AI tooling used to co-author this PR?
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## Related Issues
• Closes #XXXX
## Summary by Sourcery
Tests:
• Simplify the CLI test runner fixture by dropping the mix_stderr override now that Click<8.2 is no longer supported.
meltano/meltano