PipReport option to fallback and parse roots from source

[pauld-msft]

PipReportOverrideBehavior that allows us to skip pip report or fallback to scanning source files directly without reaching out to remote package repos for the full dependency graph.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.65217% with 4 lines in your changes missing coverage. Please review.

Project coverage is 76.3%. Comparing base (52daf67) to head (9106e38).

Files	Patch %	Lines
...ection.Detectors/pip/PipReportComponentDetector.cs	95.0%	1 Missing and 2 partials :warning:
...ectors/pip/Contracts/PipDependencySpecification.cs	93.7%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1190     +/-   ##
=======================================
+ Coverage   76.2%   76.3%   +0.1%     
=======================================
  Files        257     257             
  Lines      11469   11542     +73     
  Branches    1152    1158      +6     
=======================================
+ Hits        8741    8811     +70     
- Misses      2396    2397      +1     
- Partials     332     334      +2     

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[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 🙂