Added a generic version of the ID descriptor method

[glen-84]

Summary of the changes (Less than 80 chars)

• Added a generic version of the ID descriptor method.

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 6 lines in your changes missing coverage. Please review.

Project coverage is 77.89%. Comparing base (bc437c4) to head (f33fbe8).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/Types/Relay/Extensions/RelayIdFieldExtensions.cs	71.42%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7503   +/-   ##
=======================================
  Coverage   77.88%   77.89%           
=======================================
  Files        2826     2826           
  Lines      141987   142008   +21     
=======================================
+ Hits       110585   110614   +29     
+ Misses      31402    31394    -8     

Flag	Coverage Δ
unittests	77.89% <71.42%> (+<0.01%)	⬆️

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