Use Ruff instead of flake8

[pjonsson]

Reason for this pull request

Ruff is a fast linter that can check the rules of flake8 and a number of flake8 plugins. Ruff is made by the same people that make uv, and my experience from making a few functional bug reports on Ruff in Q2 2024 is that the bugs were fixed within hours/days, and a new release of Ruff was available within a week.

The main advantage beyond the speed is that after this PR, uv sync provides everything for development, so it's easy to uv run ruff check --fix locally during development.

There are Ruff lint failures on the current develop branch, so this PR consists of a number of individual commits that fixes these problems in the code and gives a reasonable commit message for each one of them so git blame can be followed, and then a commit that adds Ruff to pyproject.toml, switches from flake8 to Ruff in the pre-commit config, and adds a couple of suppressions in the source code.

Besides the code fixes, this PR mirrors opendatacube/datacube-explorer#587 except no formatting checks are enabled.

Proposed changes

• Closes #xxxx

• Tests added / passed

• Fully documented, including docs/about/whats_new.rst for all changes

---

📚 Documentation preview 📚: https://datacube-core--1789.org.readthedocs.build/en/1789/

[pjonsson]

This polygon is unused and it didn't work to copy the assert for the corresponding pm equivalence for this, so disabling the check for now. Will make an issue so someone who knows about these things can take a look at it later.

[codecov]

Codecov Report

Attention: Patch coverage is 63.63636% with 4 lines in your changes missing coverage. Please review.

Project coverage is 85.78%. Comparing base (9702d15) to head (acbd251).
Report is 513 commits behind head on develop.

Files with missing lines	Patch %	Lines
datacube/utils/geometry/_base.py	0.00%	2 Missing ⚠️
datacube/index/abstract/_products.py	0.00%	1 Missing ⚠️
datacube/storage/_rio.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1789      +/-   ##
===========================================
+ Coverage    85.76%   85.78%   +0.01%     
===========================================
  Files          149      149              
  Lines        16186    16180       -6     
===========================================
- Hits         13882    13880       -2     
+ Misses        2304     2300       -4     

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[omad]

Look good to me, thanks.