feat: export k6 results output to the OTEL collector

[namkyu1999]

What this PR does / why we need it:

k6 supports exporting results output in real-time.

This PR implements exporting results output to the OTEL collector followed this instruction.

Here's a result. k6 automatically converts all metric types to an equivalent OTEL metric type. So we don't have to do anything.

Also, I added tags named trace_id so we can filter by current trace context.

dependencies: #725
fyi: config format

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #724

Special notes for your reviewer:

Checklist:

• Fixes Backlogs of k6 chaos fault #724
• PR messages has document related information
• Labelled this PR & related issue with breaking-changes tag
• PR messages has breaking changes related information
• Labelled this PR & related issue with requires-upgrade tag
• PR messages has upgrade related information
• Commit has unit tests
• Commit has integration tests
• E2E run Required for the changes