Bump PyTensor to 2.9.1

[michaelosthege]

What is this PR about?
Updating to the latest PyTensor version, because I'm looking forward to a bugfix in the release after, and I want things to go smooth =)

After major complications due to (unnoticed) broken release pipelines on the PyTensor side, it appears that the upgrade actually was comparably smooth with only a minor typing issue.

Checklist

• Explain important implementation details 👆
• Make sure that the pre-commit linting/style checks pass.
• Link relevant issues (preferably in nice commit messages)
• Are the changes covered by tests and docstrings?
• Fill out the short summary sections 👇

Major / Breaking Changes

• Updated PyTensor 2.8.11→2.9.1

Maintenance

• Turned off *.tar.bz2-only installations because PyTensor 2.9.1 is no longer available from .tar-bz2 artifacts. This may break caching in GitHub Actions.

[michaelosthege]

[twiecki]

Also requires pre-commit (and rtd?)

[michaelosthege]

Also requires pre-commit (and rtd?)

I did a Ctrl+H for 2.8.11..
Also checked again, but pre-commit config and rtd don't specify PyTensor versions 🙂

[twiecki]

Updated PyTensor 2.8.11→2.8.12

[michaelosthege]

We might be running into problems with our environment creation settings:
I can mamba create -n pttest -c conda-forge pytensor=="2.9.1" just fine locally, but in CI it says nothing provides requested pytensor 2.9.1** on all three OS.

The only difference w.r.t. 2.8.11 I can spot is that 2.8.11 was available as *.tar.bz2 artifacts on conda-forge but 2.9.1 is only available as *.conda artifacts.

IIRC there's something about the conda caching forcing us to install from *.tar.bz2 artifacts; currently looking for the respective lines in the yamls...

[codecov]

Codecov Report

Merging #6431 (e062237) into main (3d747af) will decrease coverage by 55.71%.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6431       +/-   ##
===========================================
- Coverage   94.77%   39.05%   -55.72%     
===========================================
  Files         148      148               
  Lines       27730    27717       -13     
===========================================
- Hits        26280    10825    -15455     
- Misses       1450    16892    +15442     

Impacted Files	Coverage Δ
pymc/distributions/shape_utils.py	42.79% <0.00%> (-55.08%)	⬇️
pymc/tests/backends/test_base.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/logprob/test_utils.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/logprob/test_cumsum.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/tuning/test_scaling.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/logprob/test_mixture.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/tuning/test_starting.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/backends/test_ndarray.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/logprob/test_abstract.py	0.00% <0.00%> (-100.00%)	⬇️
pymc/tests/sampling/test_forward.py	0.00% <0.00%> (-100.00%)	⬇️
... and 102 more