Bug 1823654 - Introduce pyupgrade

[yschneider-sinneria]

This MR introduces pyupgrade's syntax rules.

There are 3 commits:

• 11671af is some easy fixes done by Ruff automatically, mostly string formatting syntax,
• 1c59886 includes some harder (ruff says unsafe) autofixes,
• a0a6ea2 includes some final typing.List -> list upgrades

[codecov-commenter]

Codecov Report

Attention: 55 lines in your changes are missing coverage. Please review.

Comparison is base (a0e7092) 77.08% compared to head (aeaabe5) 76.95%.

Files	Patch %	Lines
treeherder/model/models.py	20.00%	16 Missing ⚠️
treeherder/webapp/api/push.py	12.50%	7 Missing ⚠️
treeherder/webapp/api/investigated_test.py	0.00%	5 Missing ⚠️
treeherder/webapp/api/jobs.py	16.66%	5 Missing ⚠️
treeherder/perf/models.py	76.47%	4 Missing ⚠️
treeherder/intermittents_commenter/commenter.py	25.00%	3 Missing ⚠️
treeherder/etl/taskcluster_pulse/handler.py	0.00%	2 Missing ⚠️
treeherder/utils/github.py	75.00%	2 Missing ⚠️
tests/webapp/api/test_performance_alerts_api.py	0.00%	1 Missing ⚠️
treeherder/changelog/models.py	0.00%	1 Missing ⚠️
... and 9 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7904      +/-   ##
==========================================
- Coverage   77.08%   76.95%   -0.14%     
==========================================
  Files         544      544              
  Lines       26943    26931      -12     
  Branches     3377     3377              
==========================================
- Hits        20770    20725      -45     
- Misses       6006     6039      +33     
  Partials      167      167              

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