Fix IntegrationMap on empty subds with physical quads

[ericneiva]

This PR implements analogous fixes to 7ba6965 when the quadrature points are in the physical domain.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 88.86%. Comparing base (fd2a682) to head (a597d52).

Files with missing lines	Patch %	Lines
src/Fields/FieldsInterfaces.jl	61.53%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1012      +/-   ##
==========================================
- Coverage   88.87%   88.86%   -0.02%     
==========================================
  Files         195      195              
  Lines       23575    23593      +18     
==========================================
+ Hits        20953    20966      +13     
- Misses       2622     2627       +5     

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