Rewrite wheel_resolver tests to run under unittest #808

Job	Run time
Test (Python 3.13, in-repo please_pex) / Run tests	49s
Test (Python 3.10, in-repo please_pex) / Run tests	49s
Test (Python 3.14, in-repo please_pex) / Run tests	59s
Test (Python 3.9, in-repo please_pex) / Run tests	52s
Test (Python 3.11, in-repo please_pex) / Run tests	49s
Test (Python 3.12, in-repo please_pex) / Run tests	54s
Test wheel_resolver (Python 3.13) / Run tests	15s
Test wheel_resolver (Python 3.12) / Run tests	11s
Test wheel_resolver (Python 3.11) / Run tests	14s
Test wheel_resolver (Python 3.14) / Run tests	18s
Test wheel_resolver (Python 3.10) / Run tests	13s
Test wheel_resolver (Python 3.9) / Run tests	12s
Test (Python 3.14, stable please_pex release) / Run tests	52s
Test (Python 3.10, stable please_pex release) / Run tests	44s
Test (Python 3.11, stable please_pex release) / Run tests	39s
Test (Python 3.12, stable please_pex release) / Run tests	56s
Test (Python 3.9, stable please_pex release) / Run tests	38s
Test (Python 3.13, stable please_pex release) / Run tests	42s
Release wheel_resolver	-1s
Release plugin	-1s
Release please_pex	0s
	11m 4s

Provide feedback