Explicitly remove AePPL IR from conditional_logprob results

[brandonwillard]

This PR adds a clean-up step to conditional_logprob that removes AePPL-specific IR. It also has a couple important updates for recent CI and Aesara updates.

Closes #222.

[codecov]

Codecov Report

Base: 96.12% // Head: 96.19% // Increases project coverage by +0.06% 🎉

Coverage data is based on head (8a04864) compared to base (7890228).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #223      +/-   ##
==========================================
+ Coverage   96.12%   96.19%   +0.06%     
==========================================
  Files          12       12              
  Lines        1987     1996       +9     
  Branches      241      239       -2     
==========================================
+ Hits         1910     1920      +10     
  Misses         39       39              
+ Partials       38       37       -1     

Impacted Files	Coverage Δ
aeppl/abstract.py	98.64% <100.00%> (+0.01%)	⬆️
aeppl/joint_logprob.py	94.44% <100.00%> (ø)
aeppl/rewriting.py	95.91% <100.00%> (+0.31%)	⬆️
aeppl/transforms.py	96.93% <100.00%> (+0.26%)	⬆️

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