fix(healthchecks): instrument healthchecks with component span

[StephenWakely]

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Fixes #20356

This instruments the healthcheck task with the sink component span.

The aws s3 sink healthcheck sends a request to check the bucket can be written to. During the AWS upgrade a wrapper over the http connection was created that could instrument the bytes sent. Since the healthcheck was not being instrumented this resulted in an empty component_sent_bytes_total being emitted.

I am quite surprised that this error hasn't cropped up sooner, so it is well worth double checking that I am fixing this the correct way.

[datadog-vectordotdev[bot]]

Datadog Report

Branch report: stephen/instrument_healthchecks Commit report: 9c07ae3 Test service: vector

:white_check_mark: 0 Failed, 87 Passed, 0 Skipped, 4m 31.58s Wall Time

[StephenWakely]

Pushed code to use a flag to not emit. Still need to -

• [ ] Update PR title to more accurately describe what it's doing
• [ ] Check all the AWS components to ensure they all do this.

Moving to draft until I do those..