Add TestMethodIdentifierProperty constructor with arity parameter

[Youssef1313]

Fixes #5516

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 38.88889% with 11 lines in your changes missing coverage. Please review.

Project coverage is 76.30%. Comparing base (0e87d5a) to head (9d28dd6).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...ft.Testing.Platform/Messages/TestNodeProperties.cs	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5528      +/-   ##
==========================================
+ Coverage   73.96%   76.30%   +2.34%     
==========================================
  Files         603      603              
  Lines       36396    36408      +12     
==========================================
+ Hits        26920    27782     +862     
+ Misses       9476     8626     -850     

Flag	Coverage Δ
Debug	76.30% <38.88%> (+2.34%)	⬆️
integration	76.30% <38.88%> (+2.34%)	⬆️
production	76.30% <38.88%> (+2.34%)	⬆️
unit	76.30% <38.88%> (+2.34%)	⬆️

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Files with missing lines	Coverage Δ
....VSTestBridge/ObjectModel/ObjectModelConverters.cs	94.05% <100.00%> (-0.12%)	⬇️
...t.Testing.Platform/ServerMode/JsonRpc/Json/Json.cs	89.44% <100.00%> (+0.04%)	⬆️
...Platform/ServerMode/JsonRpc/SerializerUtilities.cs	91.77% <100.00%> (+0.02%)	⬆️
...ft.Testing.Platform/Messages/TestNodeProperties.cs	82.24% <8.33%> (-9.43%)	⬇️

... and 63 files with indirect coverage changes

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