Implement AdvancedIncSubtensorExplicit

[jaanerik]

Description

Allows vectorizing AdvancedIncSubtensor. Explicitly decomposes slice objects into start/stop/step Tensors.
NB: It is important to note that I am way over my head - this is vibe coded with Gemini. I had problem with using pymc-extras and this fixed my pathfinder fitting issues.

Related Issue

• Closes Reconsider use of SliceType and NoneType Variables as inputs to AdvancedIndexing #541
• Related to pymc-extras#577

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

[ricardoV94]

See #1622 and original issue #541 for the approach we want to take

[jaanerik]

See #1622 and original issue #541 for the approach we want to take

Thanks for the reply. Tried to pick up where copilot left off with #1756.