refactor: rename op2 to op (#967) #3512

Job	Run time
compute-jobs	4s
build-linux / linux lint	1m 55s
build-linux / linux lint-deps	1m 44s
build-linux / linux coverage	5m 53s
build-linux / linux test	6m 57s
build-linux / linux test-miri	6m 58s
build-linux / linux test-ops	8m 6s
build-linux / linux test-publish	1m 38s
build-linux-arm / linux-arm test	10m 21s
build-linux-arm / linux-arm test-miri	11m 3s
build-linux-arm / linux-arm lint	3m 7s
build-macos / macos lint	2m 19s
build-linux-xl / linux-xl test-valgrind	25m 54s
build-macos / macos test	8m 28s
build-windows / windows lint	9m 12s
build-windows / windows test	14m 19s
success	1s
	1h 57m 59s

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