fix(aws): Allow HCL rendering.

[tjholm]

Enables rendering AWS main module terraform output in HCL, by moving api spec outputs to a file referenced as a terraform asset.

To test hcl output run SYNTH_HCL_OUTPUT=true nitric up (HCL config flags do not currently work in cdktf).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.24%. Comparing base (37a4af8) to head (e53c99e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #640      +/-   ##
==========================================
+ Coverage   49.21%   49.24%   +0.03%     
==========================================
  Files          23       23              
  Lines        3233     3233              
==========================================
+ Hits         1591     1592       +1     
  Misses       1537     1537              
+ Partials      105      104       -1     

Flag	Coverage Δ
aws	43.82% <ø> (+0.07%)	⬆️
azure	53.29% <ø> (ø)
core	77.88% <ø> (ø)
gcp	47.17% <ø> (ø)

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