[cmd/opampsupervisor] Add collector download updates functionality to package manager

[dpaasman00]

Component(s)

cmd/opampsupervisor

Is your feature request related to a problem? Please describe.

Once #35503 is merged the supervisor will be able to upgrade the collector. While it is downloading the newest collector binary, if it is particularly large or the env has low bandwidth speeds, we may want a way to provide status updates as the download proceeds. This way the user is informed about the download and knows the process is frozen/hanging if it takes a long time.

Describe the solution you'd like

Maybe we can make a custom wrapper for the io.Reader interface that is able to provide updates after some amount of bytes have been read as it progresses through the download. This part is still tbd.

Describe alternatives you've considered

No response

Additional context

Follow up from this PR comment.

[github-actions]

Pinging code owners:

• cmd/opampsupervisor: @evan-bradley @atoulme @tigrannajaryan

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