osclib/list_command.py: Allow overriding reviews filter from the command line. #1792

Job	Run time
linters	41s
tests (Long1)	14m 43s
smoke-test (registry.opensuse.org/opensuse/tumbleweed:latest)	1m 6s
tests (Long2)	12m 26s
smoke-test (registry.opensuse.org/opensuse/leap:15.6)	1m 23s
tests (Rest)	10m 22s
	40m 41s

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