feature(physical-plan): add NullAwareMode to SortMergeJoinExec

[TinyMurky]

This is a draft PR, I'm still working on the issue

Which issue does this PR close?

• Closes Support null-aware (NOT IN) anti / mark joins in SortMergeJoinExec #25546

Rationale for this change

What changes are included in this PR?

What is the testing strategy for this PR?

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.71%. Comparing base (6f3f7b7) to head (bd3306c).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...on/physical-plan/src/joins/sort_merge_join/exec.rs	0.00%	22 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #26090      +/-   ##
==========================================
- Coverage   82.72%   82.71%   -0.01%     
==========================================
  Files        1147     1147              
  Lines      448179   448201      +22     
  Branches   448179   448201      +22     
==========================================
- Hits       370751   370744       -7     
- Misses      54898    54923      +25     
- Partials    22530    22534       +4     

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