multidimensional MMM initialization validation

[IlanDanial]

Description

Added the fixes put in the review where desired attributes can now be set to none and got rid of dict fixer.

Related Issue

• Closes Add pydantic validation multidimensional MMM init #1474
• [] Related to #

Checklist

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

---

📚 Documentation preview 📚: https://pymc-marketing--1725.org.readthedocs.build/en/1725/

[IlanDanial]

Sorry had a hard time adding to my last pull main changes are on the following lines
tests/mmm/test_multidimensional.py 904-919
pymc_marketing/mmm/multidimensional.py 147-160
And I deleted which was 185-187
for side in ("channel", "target"):
if side in scaling and isinstance(scaling[side], dict):
scaling[side].setdefault("dims", self.dims)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.59%. Comparing base (33dc122) to head (0b8f36e).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1725   +/-   ##
=======================================
  Coverage   91.59%   91.59%           
=======================================
  Files          60       60           
  Lines        6780     6782    +2     
=======================================
+ Hits         6210     6212    +2     
  Misses        570      570           

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[juanitorduz]

hi @IlanDanial , is this the same as in #1721 ? Shall we close #1721 then ?

[IlanDanial]

Yes it is the same as 1721 just closed it sorry for the confusion @juanitorduz

[juanitorduz]

Thank you @IlanDanial !