Inductor custom pass mechanism that maintains config constraints

From discussion with @oulgen . We require configs to be serializable. The inductor custom pass mechanism is to put a stateful object into the inductor config. The stateful object is not always serializable. We should have a better custom pass mechanism that isn't putting a stateful object into the inductor config, then migrate vLLM to using it so we stop triggering this problem.

cc @chauhang @penguinwu @voznesenskym @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @kadeng @muchulee8 @amjames @aakhundov @coconutruben