Fixed monkeypatch and werkzeug deprecation

[darkhpk]

Added fixes introduces in the PR #6072 and fixed the deprecation error encountered in the aforementioned PR.

Fixes Issue: #6071
Fixes PR: #6072

Testing:

pypy3.11: OK ✔ in 32.09 seconds
docs: OK ✔ in 35.11 seconds
py3.14: OK (21.92=setup[12.60]+cmd[9.32] seconds)
py3.14t: OK (18.54=setup[4.81]+cmd[13.73] seconds)
py3.13: OK (16.17=setup[2.54]+cmd[13.63] seconds)
py3.12: OK (21.51=setup[12.76]+cmd[8.75] seconds)
py3.11: OK (16.17=setup[2.83]+cmd[13.34] seconds)
py3.10: OK (22.89=setup[13.22]+cmd[9.68] seconds)
py3.9: OK (22.07=setup[1.70]+cmd[20.37] seconds)
pypy3.11: OK (32.09=setup[12.34]+cmd[19.75] seconds)
tests-min: OK (28.08=setup[7.55]+cmd[7.61,12.91] seconds)
tests-dev: FAIL code 1 (28.08=setup[4.02]+cmd[10.76,13.29] seconds)

But i don't understand for the tests-dev fail, if you can run it in git action to check if it is not a local setup/dependencies problem
would be wonderful.

[davidism]

Duplicate of #6095.
Also you say you copied a PR that was AI generated. We don't accept AI generated output: https://palletsprojects.com/contributing/llm-ai