refactor: avoid downcasting to SessionState

[roeap]

Description

We maintain duplicate versions of the session_state_from_session function to downcast a datafusion Session to SessionState. By now we can omit this however and just update a few apis to allow for the more permissible Session.

part-of #3799

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.38%. Comparing base (aad4499) to head (c00e257).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3813      +/-   ##
==========================================
+ Coverage   74.37%   74.38%   +0.01%     
==========================================
  Files         145      145              
  Lines       39482    39467      -15     
  Branches    39482    39467      -15     
==========================================
- Hits        29365    29359       -6     
+ Misses       8719     8711       -8     
+ Partials     1398     1397       -1     

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