Support virtual filesystems without embedded Python virtual environment. #231

Job	Run time
maven_bundle_url	15s
pre_commit	35s
build (windows-latest)	2m 45s
build (ubuntu-latest)	4m 0s
build (macos-latest)	4m 45s
integration (macos-latest, test_maven_plugin.py)	36m 39s
integration (ubuntu-latest, test_maven_plugin.py)	1h 7m 49s
integration (macos-latest, test_jbang_integration.py)	21m 3s
integration (ubuntu-latest, test_jbang_integration.py)	44m 30s
integration (windows-latest, test_jbang_integration.py)	10m 48s
unit-mp (ubuntu-latest)	2m 22s
unit-cp (ubuntu-latest)	31m 15s
integration (ubuntu-latest, test_gradle_plugin.py)	47m 37s
integration (windows-latest, test_maven_plugin.py)	1h 13m 10s
integration (macos-latest, test_gradle_plugin.py)	25m 28s
integration (windows-latest, test_gradle_plugin.py)	54m 50s
unit-cp (windows-latest)	1h 28m 34s
isolate-it (ubuntu-latest)	2m 42s
unit-it-mp (ubuntu-latest)	2m 21s
unit-it-mp (windows-latest)	3m 18s
unit-mp (macos-latest)	2m 46s
unit-mp (windows-latest)	3m 56s
unit-cp (macos-latest)	37m 23s
unit-it-mp (macos-latest)	2m 42s
	9h 31m 33s

Provide feedback