Fix vanilla wind gen with layout

[ppinchuk]

Previously, wind direction was not being extracted from the resource and passed to SAM for wind vanilla reV. Presumably this is because it was intended to be run with a single turbine fixed in the middle.

This default case is still supported in a backwards-compatible way (i.e. no wind direction resource extracted), but if a layout is specified in any SAM config, the wind direction is now pulled into the resource.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.69%. Comparing base (7d4a339) to head (534bb71).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #465      +/-   ##
==========================================
+ Coverage   87.63%   87.69%   +0.06%     
==========================================
  Files         122      122              
  Lines       18140    18175      +35     
==========================================
+ Hits        15897    15939      +42     
+ Misses       2243     2236       -7     

Flag	Coverage Δ
unittests	87.69% <100.00%> (+0.06%)	⬆️

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