Incorrect machine core detection on Windows platforms

[anton-ubi]

Describe the bug
On Windows platforms, hosts cannot pick up jobs due to available processors incorrect detection.

The following error is constantly raised:

CoreReservationFailureException: Not launching, insufficient hyperthreading cores to reserve based on frameCores (0 < 36)

Details:
The reserveHT method of the RQD Machine class relies on a __procs_by_physid_and_coreid attribute that is not correctly filled when on a Windows platform. It is actually only filled when on Linux.

See:

• reserveHT relying on __procs_by_physid_and_coreid: https://github.com/AcademySoftwareFoundation/OpenCue/blob/master/rqd/rqd/rqmachine.py#L842
• the line where the error is raised: https://github.com/AcademySoftwareFoundation/OpenCue/blob/master/rqd/rqd/rqmachine.py#L857
• __procs_by_physid_and_coreid being filled only if on a Linux platform: https://github.com/AcademySoftwareFoundation/OpenCue/blob/master/rqd/rqd/rqmachine.py#L613

To Reproduce

• Submit a job so it is dispatched to a machine running on Windows.
• Job has to have non fractional cores (the regular usage, nothing fancy here), else the reserveHT is skipped.

Expected behavior
The job should be picked up without raising a CoreReservationFailureException error.

Version Number
Spotted on 0.22.0. But looking at the current state of master, it seems nothing has changed since.

Additional context
Relates to #1171
A fix is already being addressed : #1468