[PR #7808/213d1b2 backport][3.10] 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 (0a75ef0) 97.35% compared to head (6a600a9) 97.35%.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #7921   +/-   ##
=======================================
  Coverage   97.35%   97.35%           
=======================================
  Files         108      108           
  Lines       32542    32542           
  Branches     3852     3852           
=======================================
  Hits        31682    31682           
  Misses        655      655           
  Partials      205      205           

Flag	Coverage Δ
CI-GHA	97.26% <ø> (ø)
OS-Linux	96.96% <ø> (ø)
OS-Windows	94.46% <ø> (+<0.01%)	⬆️
OS-macOS	96.77% <ø> (+0.19%)	⬆️
Py-3.10.11	94.36% <ø> (ø)
Py-3.10.13	96.73% <ø> (ø)
Py-3.11.6	96.49% <ø> (+0.03%)	⬆️
Py-3.12.0	96.39% <ø> (-0.12%)	⬇️
Py-3.8.10	94.35% <ø> (+<0.01%)	⬆️
Py-3.8.18	96.66% <ø> (ø)
Py-3.9.13	94.35% <ø> (ø)
Py-3.9.18	96.71% <ø> (ø)
Py-pypy7.3.13	96.17% <ø> (ø)
VM-macos	96.77% <ø> (+0.19%)	⬆️
VM-ubuntu	96.96% <ø> (ø)
VM-windows	94.46% <ø> (+<0.01%)	⬆️

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