Move i2c to clash cores #2472

Job	Run time
Build and Test	0s
Build and run limited tests (macOS, 8.6)	15m 24s
Build and run limited tests (macOS, 8.8)	11m 45s
Build and run limited tests (macOS, 9.0)	13m 35s
Build and run limited tests (macOS, 9.2)	9m 59s
Build and run limited tests (macOS, 9.4)	17m 34s
Build and run limited tests (windows, 8.6)	13m 54s
Build and run limited tests (windows, 8.10)	19m 4s
Build and run limited tests (windows, 9.2)	11m 51s
Build and run limited tests (windows, 9.4)	12m 57s
All jobs finished	5s
	2h 6m 8s

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