Improve -Identity lookup

[jborean93]

Improves the logic for finding an AD object that is not in the default naming context. This matches the behaviour of the builtin AD cmdlets.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.52%. Comparing base (0869f35) to head (a81c520).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
+ Coverage   69.66%   79.52%   +9.86%     
==========================================
  Files          62       62              
  Lines        7225     7696     +471     
  Branches      899      901       +2     
==========================================
+ Hits         5033     6120    +1087     
+ Misses       1646     1339     -307     
+ Partials      546      237     -309     

Flag	Coverage Δ
Linux_74_Heimdal	79.24% <100.00%> (+9.69%)	⬆️
Linux_74_MIT	79.26% <100.00%> (+9.71%)	⬆️
Linux_75_Heimdal	79.35% <100.00%> (+9.80%)	⬆️
Linux_75_MIT	79.26% <100.00%> (+9.72%)	⬆️

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