[PR #7808/213d1b2 backport][3.9] Restore requirements-txt-fixer in pre-commit

[alexrudd2]

Backport of #7808 cherry picked from commit 213d1b2

What do these changes do?

Repair a useless pre-commit hook, since requirements.txt was removed in #6165

This can be verified with pre-commit run --all-files.

Are there changes in behavior for the user?

No

[alexrudd2]

@Dreamsorcerer

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0bc17e6) 97.13% compared to head (0eb99b4) 97.35%.

Additional details and impacted files

@@            Coverage Diff             @@
##              3.9    #7920      +/-   ##
==========================================
+ Coverage   97.13%   97.35%   +0.21%     
==========================================
  Files         108      108              
  Lines       32459    32459              
  Branches     3133     3849     +716     
==========================================
+ Hits        31529    31600      +71     
+ Misses        710      655      -55     
+ Partials      220      204      -16     

Flag	Coverage Δ
CI-GHA	97.26% <ø> (+0.18%)	⬆️
OS-Linux	96.95% <ø> (+0.16%)	⬆️
OS-Windows	94.45% <ø> (ø)
OS-macOS	96.76% <ø> (?)
Py-3.10.11	94.35% <ø> (ø)
Py-3.10.13	96.73% <ø> (+0.04%)	⬆️
Py-3.11.6	96.45% <ø> (?)
Py-3.12.0	96.39% <ø> (?)
Py-3.8.10	94.33% <ø> (+<0.01%)	⬆️
Py-3.8.18	96.66% <ø> (ø)
Py-3.9.13	94.34% <ø> (-0.01%)	⬇️
Py-3.9.18	96.71% <ø> (+0.03%)	⬆️
Py-pypy7.3.13	96.17% <ø> (?)
VM-macos	96.76% <ø> (?)
VM-ubuntu	96.95% <ø> (+0.16%)	⬆️
VM-windows	94.45% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.