Support for mocking nexus operations #2221

Job	Run time
cloud-test (oldstable)	22s
build-and-test (ubuntu-latest, oldstable)	16m 58s
cloud-test (stable)	18s
build-and-test (ubuntu-latest, stable)	25m 52s
build-and-test (macos-intel, oldstable)	19m 27s
build-and-test (macos-intel, stable)	19m 31s
build-and-test (macos-arm, oldstable)	16m 42s
build-and-test (macos-arm, stable)	16m 58s
build-and-test (windows-latest, oldstable)	21m 5s
build-and-test (windows-latest, stable)	18m 36s
features-test / test	2m 1s
	2h 37m 50s

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