Add missing bisect_ppx instrumentation #14621

Job	Run time
regression (macos-13, ocaml-variants.4.14.2+options,ocaml-option-flambda)	32m 43s
regression (ubuntu-22.04, ocaml-variants.4.14.2+options,ocaml-option-flambda)	7m 33s
extraction	0s
	40m 16s

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