Increase assert_cmd dependency lower bound to 2.2.0 #4847

Job	Run time
checks_with_tang_should_fail (TANG_URL=localhost make -f Makefile test-clevis-loop-should-fail-ro...	7m 4s
checks_with_udev (RUST_LOG=stratisd=debug make -f Makefile test-loop-root, cargo)	39m 45s
checks (make -f Makefile build-no-ipc, cargo)	2m 32s
checks (make -f Makefile build, cargo)	4m 48s
checks (make -f Makefile test, cargo)	2m 51s
checks (PROFILEDIR=debug make -f Makefile stratisd-tools, cargo)	1m 20s
checks (make -f Makefile docs-ci, cargo)	2m 17s
checks (make -f Makefile build-min, cargo)	2m 41s
checks (make -f Makefile clippy, clippy)	3m 19s
checks (PROFILEDIR=debug make -f Makefile build-min-no-systemd, cargo)	1m 25s
checks (PROFILEDIR=debug make -f Makefile build, cargo)	2m 33s
checks (PROFILEDIR=debug make -f Makefile build-no-ipc, cargo)	1m 20s
checks (PROFILEDIR=debug make -f Makefile build-utils, cargo)	2m 28s
checks (PROFILEDIR=debug make -f Makefile build-min, cargo)	1m 30s
	1h 15m 53s

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