Don't report `hw.status{state="present"}` for `cpu` monitors discovered by Linux and Window connectors

[NassimBtk]

Proposal

The missing device detection in HardwarePostDiscoveryStrategy should exclude monitors discovered from connectors that lack the hardware tag.

[MedMaalej]

I tested the fix locally on my computer. The tests covered those cases:

• A Linux host containing hardware monitors (using the host: babbage, linux connector)

Grafana should not display any hw.status metric at all.

• A Windows host containing hardware monitors (using localhost, WinStorageSpaces connector)

Grafana should display hw.status metric for all nonendpoint host monitors for which the connector has "hardware" tag. For endpoint host monitors, only the endpoint hosts having at least one connector monitor having "hardware" tag.