We will have three separate plan cache related files:
- plan_cache.h will house the common code shared between the classic and SBE plan caches.
- sbe_plan_cache.h for plan cache code specific to the SBE plan cache.
- classic_plan_cache.h for plan cache code specific to the classic plan cache.
The goal of this ticket is to create classic_plan_cache.h, by moving any code which belongs there out of plan_cache.h.