Add run mode skip to cylc show #8637

Job	Run time
1/4	13m 15s
2/4	13m 47s
3/4	12m 11s
4/4	16m 24s
py-3-latest	16m 54s
flaky	6m 2s
_remote_background_indep_poll	4m 50s
_remote_background_indep_tcp	7m 37s
macos 1/5	20m 18s
macos 2/5	17m 15s
codecov	14s
	2h 8m 47s

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