Disable violation cram tests on OSX #14627

Job	Run time
extraction	0s
regression (macos-13, ocaml-variants.4.14.2+options,ocaml-option-flambda)	20m 58s
regression (ubuntu-22.04, ocaml-variants.4.14.2+options,ocaml-option-flambda)	6m 50s
	27m 48s

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