[receiver/vcenter] Additional two metrics for vCenter receiver

[samiura]

Component(s)

receiver/vcenter

Describe the issue you're reporting

There are various metrics that we don't currently capture or could capture at a higher level as mentioned on this issue before.

Adding these two additional metrics to the Vcenter receiver and by default they are disabled. These two seem to be useful for monitoring any Vcenter/ESXi server.

1. vcenter.host.cpu.capacity
2. vcenter.vm.memory.granted

[github-actions]

Pinging code owners:

• receiver/vcenter: @schmikei @StefanKurek

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[samiura]

Already I have an PR ready for this issue #37253

[github-actions]

Pinging code owners for receiver/vcenter: @schmikei @StefanKurek. See Adding Labels via Comments if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triaged' to set the priority and remove the needs-triaged label.