feat: implement /detectResource e2e scenario

[aabmass]

Implement /detectResource e2e scenario with envDetector + our local resource detector. Tests are passing :)

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@88be17e). Click here to learn what that means.
The diff coverage is 100.00%.

❗ Current head 7a2628a differs from pull request most recent head e02a272. Consider uploading reports for the commit e02a272 to get more accurate results

@@           Coverage Diff           @@
##             main     #468   +/-   ##
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  Coverage        ?   95.60%           
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  Files           ?       16           
  Lines           ?      546           
  Branches        ?      101           
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  Hits            ?      522           
  Misses          ?       24           
  Partials        ?        0           

Impacted Files	Coverage Δ
...entelemetry-resource-util/src/detector/detector.ts	100.00% <100.00%> (ø)
...es/opentelemetry-resource-util/src/detector/gce.ts	100.00% <100.00%> (ø)
...es/opentelemetry-resource-util/src/detector/gke.ts	100.00% <100.00%> (ø)
packages/opentelemetry-resource-util/src/index.ts	100.00% <100.00%> (ø)

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