feat(localenv): add performance metrics

[BlairCurrey]

Changes proposed in this pull request

• added timer to metric service
• used new timer to power several new graphs tracking durations for most of the main paths in the create-outgoing-payment.js k6 script.

Partial view of local dashboard (best observed locally while running performance test):

Context

fixes #2983

currently set to merge into bc/2980/refactor-telemetry-optionality because it depends on those changes.

Checklist

• [ ] Related issues linked using fixes #number
• [ ] Tests added/updated
• [ ] Make sure that all checks pass
• [ ] Bruno collection updated (if necessary)
• [ ] Documentation issue created with user-docs label (if necessary)
• [ ] OpenAPI specs updated (if necessary)

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