[Fusion] @semanticNonNull composition support

[tobias-tengler]

This PR implements the composition of semantic non-null with non-null and nullable types.

A	B	Result	Reason
Semantic Non-Null	Semantic Non-Null	Semantic Non-Null	-
Semantic Non-Null	Non-Null	Semantic Non-Null	The field will still be returned in the Semantic Non-Null case
Semantic Non-Null	Nullable	Nullable	null is an expected value
Non-Null	Non-Null	Non-Null	-
Non-Null	Nullable	Nullable	null is an expected value
Nullable	Nullable	Nullable	-

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.34%. Comparing base (becfc54) to head (221294b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7731      +/-   ##
==========================================
+ Coverage   74.32%   74.34%   +0.02%     
==========================================
  Files        2880     2881       +1     
  Lines      150293   150397     +104     
  Branches    17479    17498      +19     
==========================================
+ Hits       111709   111820     +111     
+ Misses      32767    32758       -9     
- Partials     5817     5819       +2     

Flag	Coverage Δ
unittests	74.34% <ø> (+0.02%)	⬆️

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