Remove min value for exit_span_min_duration

[felixbarny]

Remove min value for exit_span_min_duration to allow opting out of dropping fast exit spans.

This may impact the existing implementations for .NET, Go, PHP, Python, and the in-progress implementation for Java. However, it seems most have not implemented a validation that would disallow users to set exit_span_min_duration to 0.

• Create PR as draft
• Approval by at least one other agent
• Mark as Ready for Review (automatically requests reviews from all agents and PM via CODEOWNERS)
  • Remove PM from reviewers if impact on product is negligible
  • Remove agents from reviewers if the change is not relevant for them
• Merge after 2 business days passed without objections
  To auto-merge the PR, add /schedule YYYY-MM-DD to the PR description.

/schedule 2022-03-10

[apmmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2022-03-10T10:01:36.749+0000

• Duration: 3 min 22 sec

[basepi]

1us was probably "disabled" for all intents and purposes, but having the ability to explicitly disable is good.

[felixbarny]

This is scheduled to be merged in 2 days

[basepi]

Reviewing again on behalf of the Python agent