Allow selector to be null when using Select.

[michaelstaib]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 55.88235% with 15 lines in your changes missing coverage. Please review.

Project coverage is 77.94%. Comparing base (0733072) to head (9b53eca).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/Types/Types/Descriptors/ObjectFieldDescriptor.cs	58.33%	10 Missing ⚠️
.../Core/Projections/SelectionDataLoaderExtensions.cs	55.55%	4 Missing ⚠️
...ChocolatePaginationBatchingDataLoaderExtensions.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7547      +/-   ##
==========================================
- Coverage   77.94%   77.94%   -0.01%     
==========================================
  Files        2846     2846              
  Lines      142938   142958      +20     
==========================================
+ Hits       111418   111427       +9     
- Misses      31520    31531      +11     

Flag	Coverage Δ
unittests	77.94% <55.88%> (-0.01%)	⬇️

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