chore: remove circular dependency

[dyladan]

Fixes #87

The global-utils.ts depends on the diag API, which depends on global-utils. This results in a circular dependency.

Resolve by injecting the diag instance into the function at call time.

/cc @MSNev

[codecov]

Codecov Report

Merging #96 (b4055cf) into main (25cf8a4) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head b4055cf differs from pull request most recent head b00dc22. Consider uploading reports for the commit b00dc22 to get more accurate results

@@            Coverage Diff             @@
##             main      #96      +/-   ##
==========================================
+ Coverage   94.83%   94.84%   +0.01%     
==========================================
  Files          42       42              
  Lines         561      563       +2     
  Branches       87       87              
==========================================
+ Hits          532      534       +2     
  Misses         29       29              

Impacted Files	Coverage Δ
src/api/context.ts	96.29% <100.00%> (+0.14%)	⬆️
src/api/diag.ts	100.00% <100.00%> (ø)
src/api/propagation.ts	100.00% <100.00%> (ø)
src/api/trace.ts	96.77% <100.00%> (+0.10%)	⬆️
src/internal/global-utils.ts	90.62% <100.00%> (-0.29%)	⬇️

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