Add SwiftDriverJobDiscoveryCompilingCaptureGroup

[cpisciotta]

Changes

Add a concrete CaptureGroup for SwiftDriverJobDiscovery output. At this time, don't format it, since it's likely uninformative to a developer.

Testing

• Added new unit tests
• Performance regression tests showed notably positive improvements
• No unexpectedly missed output in the formatted log

[codecov]

Codecov Report

Attention: Patch coverage is 76.92308% with 3 lines in your changes missing coverage. Please review.

Project coverage is 86.87%. Comparing base (ab7ca70) to head (2440f79).

Files	Patch %	Lines
...rces/XcbeautifyLib/Renderers/OutputRendering.swift	0.00%	2 Missing ⚠️
Sources/XcbeautifyLib/Formatter.swift	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #305      +/-   ##
==========================================
- Coverage   86.95%   86.87%   -0.08%     
==========================================
  Files          14       14              
  Lines        1618     1631      +13     
==========================================
+ Hits         1407     1417      +10     
- Misses        211      214       +3     

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