use ruff for linting and formatting, update CI

[janfb]

Main changes

• replace black, isort and flake by ruff in pyproject.toml
• update pre-commit hooks
• update CI workflow similar to zuko
  • add pre-commit hooks
  • add option to add multiple python and torch versions in parallel (only 3.10 and torch 1.11 and 2.2)
• fix all ruff errors so that we can introduce ruff linting and formatting in pre-commit hooks for the hackathon

Why are there so many changed files?

• applied pre-commit fixes: trailing whitespaces and empty lines
• applied automatic linting fixes: ruff check --fix to sbi/, examples/ tutorials/ tests/
• applied automatic formatting fixes: ruff format .
• I fixed around 200 ruff check . errors manually 😵

fixes #934
fixes #959
fixes #960

Notes for reviewing

As there are so many file changes, I recommend reviewing the individual commits separately. I tried to group changes into specific commits.

• slow tests are passing locally
• GPU tests are passing for MPS and CUDA.

[codecov]

Codecov Report

Attention: Patch coverage is 69.76744% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 76.28%. Comparing base (17f3033) to head (246c8b0).

Files	Patch %	Lines
sbi/analysis/plot.py	59.09%	9 Missing ⚠️
sbi/utils/user_input_checks.py	11.11%	8 Missing ⚠️
sbi/inference/abc/smcabc.py	0.00%	3 Missing ⚠️
sbi/neural_nets/flow.py	72.72%	3 Missing ⚠️
sbi/samplers/mcmc/mcmc.py	0.00%	3 Missing ⚠️
sbi/utils/posterior_ensemble.py	0.00%	3 Missing ⚠️
sbi/inference/base.py	50.00%	2 Missing ⚠️
sbi/inference/snpe/snpe_base.py	33.33%	2 Missing ⚠️
sbi/samplers/vi/vi_utils.py	66.66%	2 Missing ⚠️
sbi/inference/posteriors/base_posterior.py	0.00%	1 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #978      +/-   ##
==========================================
+ Coverage   76.17%   76.28%   +0.10%     
==========================================
  Files          83       83              
  Lines        6406     6384      -22     
==========================================
- Hits         4880     4870      -10     
+ Misses       1526     1514      -12     

Flag	Coverage Δ
unittests	76.28% <69.76%> (+0.10%)	⬆️

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[michaeldeistler]

Thanks a lot! I did not go through tests and tutorials, but left some comments on the rest.

[michaeldeistler]

Thanks!