Replace flake8 with ruff

[johannaengland]

Dependent on #868.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 84.25%. Comparing base (4f8776e) to head (115d641).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/argus/notificationprofile/media/email.py	0.00%	1 Missing ⚠️
...rc/argus/notificationprofile/media/sms_as_email.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #869      +/-   ##
==========================================
- Coverage   84.29%   84.25%   -0.05%     
==========================================
  Files          86       86              
  Lines        3973     3950      -23     
==========================================
- Hits         3349     3328      -21     
+ Misses        624      622       -2     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
1 Accepted issue

Measures
0 Security Hotspots
0.0% Coverage on New Code
2.6% Duplication on New Code

See analysis details on SonarCloud

[hmpf]

Could you split this into several PR's?

One that:

1. changes everything that must be able to run locally first ("ruff format" instead of black in pre-commit)
2. then one that "ruff format"s all code

Then we'll need to directly push a revision to ignore blames for.

Then, we can replace flake8 with ruff for the "critical" stuff in pre-commit and tox and github actions in a new PR.

Finally, we can argue if we want to lint everything via pre-commit/tox/github actions and how many reviews that would take.

If we use ruff directly to lint, will we need Megalinter at all?

[johannaengland]

If we use ruff directly to lint, will we need Megalinter at all?

No, we won't. At least not when we have also switched to ruff for formatting.

[johannaengland]

This PR will be split into multiple smaller PRs and needs to be strongly rebased