fix(generic): support both relative and absolute check for idl includes parse to make it compatible with generation tool

[Marina-Sakai]

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fix

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[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 4 lines in your changes missing coverage. Please review.

Project coverage is 57.45%. Comparing base (23456d7) to head (fcb30c5).

Files with missing lines	Patch %	Lines
pkg/generic/thriftidl_provider.go	81.81%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1718      +/-   ##
===========================================
+ Coverage    57.40%   57.45%   +0.04%     
===========================================
  Files          408      408              
  Lines        37696    37703       +7     
===========================================
+ Hits         21640    21662      +22     
+ Misses       14739    14724      -15     
  Partials      1317     1317              

Flag	Coverage Δ
integration	45.94% <0.00%> (+0.02%)	⬆️
unit	51.90% <81.81%> (+0.04%)	⬆️

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