[bug] Any pipeline would fail on Apple M1 due to psutil.cpu_freq() not available

[hammady]

Describe the bug
I have noticed the below error right after the cameraInit node in the photogrammetry pipeline:

Failed to get statistics: "'NoneType' object has no attribute 'max'"
After some investigation I figured out the exact line that produces this (by disabling the exception handling to view the full stack trace), and it was from this file: meshroom/core/stats.py line 51.
After some digging I found that Apple M1 has no support for getting the CPU frequency using this method. See here. This causes the Statistics thread to crash.

To Reproduce
Steps to reproduce the behavior:

1. Run the photogrammetry pipeline on Apple M1
2. See error: Failed to get statistics: "'NoneType' object has no attribute 'max'" in the logs

Expected behavior
No errors, and getting the cpuFreq correctly.

Desktop (please complete the following and other pertinent information):

• OS: macOS Ventura 13.1 running on Apple M1 chip
• Python version 3.10
• Qt/PySide version (not installed)
• Meshroom version: my own build from the latest commit on master
  • Commit reference: 2f67ef3

Additional context
None.