Update to OrdinaryDiffEq split version

[ChrisRackauckas]

This both updates to the split version (reducing dependencies) and fixes some of the internals changes that occurred.

[codecov]

Codecov Report

Attention: Patch coverage is 90.24390% with 4 lines in your changes missing coverage. Please review.

Project coverage is 91.89%. Comparing base (8d3c3bb) to head (21236f9).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/alg_utils.jl	80.00%	3 Missing ⚠️
src/caches.jl	83.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #326   +/-   ##
=======================================
  Coverage   91.88%   91.89%           
=======================================
  Files          44       44           
  Lines        2219     2220    +1     
=======================================
+ Hits         2039     2040    +1     
  Misses        180      180           

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[nathanaelbosch]

Thanks a lot! Since the tests pass I'll go ahead and merge this and fix formatting on main.