Fix the direction of our integration string replacement

[abrookins]

Small fix: when we send worker metadata and normalize the way our collections and distributions() report package names, expect the integration to use underscores and the distribution to use dashes.

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
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[codspeed-hq]

CodSpeed Performance Report

Merging #15959 will not alter performance

_{Comparing fix-worker-metadata-string-replace (463186a) with main (d6a4842)}

Summary

✅ 3 untouched benchmarks