Fix issues for Windows hosts

[arno-hc]

Description

For Windows hosts function is_psutils_available() fails.

utils function get_physical_cpu_count() delivers not the number of sockets, but the number of logical cores.

Related Issue

n.a.

Motivation and Context

On Windows host the energy consumption did fall back to a constant estimation (not taking CPU load into account). The reason for this is the is_psutils_available() function not working on Windows, although psutils is functioning on Windows.

The number of physical CPU problem showed up after solving is_psutils_available(). The reported numbers were not plausible.

How Has This Been Tested?

Unit tests are added. Before that manual tests on Windows host was performed.

Screenshots (if appropriate):

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

Go over all the following points, and put an x in all the boxes that apply.

• [ x] My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• [x ] I have read the CONTRIBUTING.md document.
• [x ] I have added tests to cover my changes.
• [ x] All new and existing tests passed. --> one test seems to be flaky: test_emissions_tracker_constant.py::TestCarbonTrackerConstant::test_carbon_tracker_offline_load_force_cpu_power

[benoit-cty]

Thank you very much !
We plan to improve Windows support next month, that's a great help.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.51%. Comparing base (2d52a20) to head (abcaf04).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1054      +/-   ##
==========================================
+ Coverage   68.26%   68.51%   +0.25%     
==========================================
  Files          41       41              
  Lines        3847     3862      +15     
==========================================
+ Hits         2626     2646      +20     
+ Misses       1221     1216       -5     

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[benoit-cty]

To manually test on Windows:

1. Run: python -c "from codecarbon.core.cpu import is_psutil_available; print(is_psutil_available())"
2. Run: python -c "from codecarbon.core.util import count_physical_cpus; print(count_physical_cpus())"
3. Compare socket count with: Get-CimInstance -ClassName Win32_Processor | Measure-Object