feat: Host Telemetry: Option to filter Host/Process metrics

[marcsst]

Which problem is this PR solving?

• Running host-telemetry always adds 5 kinds of metrics (HostCPU, HostRAM, Network, ProcessCPU, ProcessRAM). Depending on your hardware this can add a lot of metrics you don't necessarily need.

Short description of the changes

• This PR adds an optional meterScope setting that can be set to only return Host (HostCPU, HostRAM, Network) or Process (ProcessCPU, ProcessRAM) metrics as desired. To avoid breaking changes this setting can be left as undefined and will still return all.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: marcsst / name: Marc Sebastian Stein (f974eb9, 8e4a466)

[pichlermarc]

@marcsst these metrics can be dropped using the View feature of the SDK. Is that what you're looking for?

See https://opentelemetry.io/docs/languages/js/instrumentation/#configure-metric-views

[marcsst]

@pichlermarc that looks exactly like what I needed >.> Thanks for pointing it out.

Marc