MAINT Update submodule commit and remove cnp imports where possible

[adam2392]

Updates scikit-tree wrt scikit-learn fork

Changes proposed in this pull request:

• Remove cnp import în Cython files where possible
• Make every tree class define _update_tree function to re-define a splitter (inefficient use of code tho; see Create an internal dictionary for BaseDecisionTree scikit-learn#64). This is done, so we don't have to pickle the splitter and builder and it works properly w/ the new code in submodule.
• Makes the trees not pickle the builder/splitter, otw can incur a huge storage cost since technically the splitter stores X.
• Updates to use ParentInfo and SplitRecord when passing information back and forth between tree and splitter (see: MAINT Pass ParentInfo rather than explicit variables scikit-learn/scikit-learn#28614 (review))

cc: @sampan501 @SUKI-O this may be useful for reviewing so you understand what Cython changes are happening

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[codecov]

Codecov Report

Attention: Patch coverage is 87.87879% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 90.04%. Comparing base (f957cdb) to head (3479b8e).

Files	Patch %	Lines
sktree/tree/_multiview.py	86.66%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #249      +/-   ##
==========================================
- Coverage   90.05%   90.04%   -0.02%     
==========================================
  Files          54       54              
  Lines        5050     5105      +55     
==========================================
+ Hits         4548     4597      +49     
- Misses        502      508       +6     

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[PSSF23]

Doc error and failing on AMD machines?

[adam2392]

Doc error and failing on AMD machines?

It should be fixed now