Merge bitcoin#34053: lint: Remove confusing, redundant, and brittle lint-spelling

fa904fc lint: Remove confusing, redundant, and brittle lint-spelling (MarcoFalke)

Pull request description:

  `codespell` was a fun experiment. However, it has many issues, when used in this project:

  * The number of false-positives and true-positives are in the same ballpark. There are also many false-negatives, so the overall net-benefit is questionable.
  * There is often confusion around spelling errors leading to a failing CI (they do not, which was intended).
  * LLMs released this year are capable to detect typos with less false-positives and less false-negatives, so the `codespell` integration is a bit redundant in that sense.

  Fix all issues by removing it.

  Going forward, anyone is free to continue to use `codespell`, or any LLM, or any other tool, locally. Also, DrahtBot has the LLM typo linter integrated in the summary comment. I think the options are plenty, and are more than sufficient for now.

ACKs for top commit:
  l0rinc:
    ACK fa904fc
  rkrux:
    ACK fa904fc
  pablomartin4btc:
    ACK fa904fc

Tree-SHA512: 5e2008a77c2c313605f30d73286111eba034a2a6bb2a0a48e2f77ec6ccc7afaa274e00bbfcb727be0ac5e547b8ae9c801d30c43589b0cad2099565e6716b9ec7

Author: fanquake

ci/lint/01_install.sh

@@ -40,7 +40,6 @@ command -v python3
 python3 --version
 
 ${CI_RETRY_EXE} pip3 install \
-  codespell==2.4.1 \
   lief==0.16.6 \
   mypy==1.18.2 \
   pyzmq==27.1.0 \

test/lint/README.md

@@ -50,7 +50,6 @@ or `--help`:
 | [`lint-python.py`](/test/lint/lint-python.py) | [pyzmq](https://github.com/zeromq/pyzmq)
 | [`lint-python-dead-code.py`](/test/lint/lint-python-dead-code.py) | [vulture](https://github.com/jendrikseipp/vulture)
 | [`lint-shell.py`](/test/lint/lint-shell.py) | [ShellCheck](https://github.com/koalaman/shellcheck)
-| [`lint-spelling.py`](/test/lint/lint-spelling.py) | [codespell](https://github.com/codespell-project/codespell)
 | `py_lint` | [ruff](https://github.com/astral-sh/ruff)
 | markdown link check | [mlc](https://github.com/becheran/mlc)