cl: PkgLinkIR/PkgLinkExtern support init if not using cgo

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[codecov]

Codecov Report

Attention: Patch coverage is 67.85714% with 9 lines in your changes missing coverage. Please review.

Project coverage is 87.74%. Comparing base (9c59ac2) to head (80bb432).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/crosscompile/cosscompile.go	18.18%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #807      +/-   ##
==========================================
- Coverage   87.82%   87.74%   -0.09%     
==========================================
  Files          29       29              
  Lines        7269     7294      +25     
==========================================
+ Hits         6384     6400      +16     
- Misses        818      827       +9     
  Partials       67       67              

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