Instrument task runs

[jeanluciano]

Adds OTEL instrumentation into the task engine so that if a user were to configure application-level telemetry, the task run engine will now emit spans for runs that capture metadata about the task run in span attributes and state changes as events on the span.

What impact will this have if I do not have telemetry configured? https://opentelemetry.io/docs/concepts/instrumentation/libraries/#performance

Performance OpenTelemetry API is no-op and very performant when there is no SDK in the application

This PR also sets up some testing infrastructure for testing otel instrumentation implemented by @collincchoy in #16010

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