osclib/list_command.py: Allow overriding reviews filter from the command line. #1824

Job	Run time
smoke-test (registry.opensuse.org/opensuse/tumbleweed:latest)	1m 45s
tests (Long1)	14m 49s
linters	43s
smoke-test (registry.opensuse.org/opensuse/leap:15.6)	1m 47s
tests (Long2)	12m 34s
tests (Rest)	10m 52s
	42m 30s

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