Add run mode skip to cylc show #8632

Job	Run time
1/4	12m 45s
2/4	15m 6s
3/4	12m 25s
4/4	15m 26s
py-3-latest	16m 50s
flaky	6m 50s
_remote_background_indep_poll	5m 21s
_remote_background_indep_tcp	7m 19s
macos 1/5	21m 59s
macos 2/5	23m 17s
codecov	0s
	2h 17m 18s

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