Pauldorsch/fix support python m pip

[pauld-msft]

When pip is not found, we should fall back to use python -m pip, which is supported when customers install the https://www.nuget.org/packages/python package

[github-actions[bot]]

👋 Hi! It looks like you modified some files in the Detectors folder. You may need to bump the detector versions if any of the following scenarios apply:

• The detector detects more or fewer components than before
• The detector generates different parent/child graph relationships than before
• The detector generates different devDependencies values than before

If none of the above scenarios apply, feel free to ignore this comment 🙂

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.4%. Comparing base (3d161b0) to head (b10fa04).

Files	Patch %	Lines
...ponentDetection.Detectors/pip/PipCommandService.cs	96.1%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1222 +/- ## ===================================== Coverage 76.4% 76.4% ===================================== Files 258 258 Lines 11650 11668 +18 Branches 1175 1179 +4 ===================================== + Hits 8905 8922 +17 Misses 2406 2406 - Partials 339 340 +1 ```

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