Add support for profiles signal type in otel collector

[MichelLosier]

Summary

Adds support for the profiles signal type when creating otel transforms

Relates to: https://github.com/elastic/prodfiler/issues/6641
Package spec changes: elastic/package-spec#1092

Can test by building the test package in the package-spec PR above in test/packages/good_input_profiles

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• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
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• Flaky Test Runner was used on any tests changed
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[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 87409fe

Metrics [docs]

✅ unchanged

[nchaulet]

code LGTM 🚀