Bug 1823654 - Mostly use double quotes

[yschneider-sinneria]

In the switch to Ruff's formatter, one of the biggest change will be the usage of double quotes, the usual norm in Python. When black was introduced, that verification was disabled, through the skip-string-normalization parameter. It was most surely done to avoid having these massive changes in the same PR.

I'm mostly doing this PR to make the change to Ruff less painful.

All files follow the double quote rule except for migrations folders, which were excluded from black from the start.
Do we still want to avoid formatting them?

[La0]

All files follow the double quote rule except for migrations folders, which were excluded from black from the start.

I see changes in migrations though in this PR. I guess we can keep them, I'll check later today with @Archaeopteryx

[marco-c]

After merging this, we should probably do something similar to https://github.com/mozilla/pdf.js/pull/17546/files.

[codecov-commenter]

Codecov Report

Attention: 132 lines in your changes are missing coverage. Please review.

Comparison is base (0beab3e) 77.08% compared to head (1b95ddd) 77.08%.

Files	Patch %	Lines
tests/webapp/api/test_bugzilla.py	61.40%	22 Missing ⚠️
treeherder/intermittents_commenter/commenter.py	51.11%	22 Missing ⚠️
tests/webapp/api/test_performance_alerts_api.py	65.51%	10 Missing ⚠️
tests/webapp/api/test_perfcompare_api.py	87.75%	6 Missing ⚠️
treeherder/model/models.py	93.02%	6 Missing ⚠️
tests/conftest.py	93.05%	5 Missing ⚠️
treeherder/etl/taskcluster_pulse/handler.py	50.00%	5 Missing ⚠️
treeherder/model/error_summary.py	82.75%	5 Missing ⚠️
treeherder/config/settings.py	89.18%	4 Missing ⚠️
treeherder/perf/auto_perf_sheriffing/sherlock.py	63.63%	4 Missing ⚠️
... and 24 more

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7900   +/-   ##
=======================================
  Coverage   77.08%   77.08%           
=======================================
  Files         544      544           
  Lines       26943    26943           
  Branches     3377     3377           
=======================================
  Hits        20770    20770           
  Misses       6006     6006           
  Partials      167      167           

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[Archaeopteryx]

@beatrice-acasandrei For your information, this will deployed tomorrow afternoon.

[yschneider-sinneria]

After merging this, we should probably do something similar to https://github.com/mozilla/pdf.js/pull/17546/files.

To be able to ignore these changes when using git blame, we should probably squash both commits into one. I can do it myself on this PR or when a Maintainer merges it. I don't know what's the norm here.