Share simulator caches

[LinqLover]

Since #78, tracing and retracing performance has dropped. For small expressions, up to 40% of the time account for TDBMemorySimulator>>#initializeAllPrimitives. Maintain shared caches to improve the situation.

Notes:

• Profile first, e.g.:

  memory := TDBMemory new.
  [[10000 timesRepeat: [(TDBRangeRetracingSimulator forMemory: memory atTimes: (1 to: 3)) evaluate: [thisContext 
  tdbRetracingTimeIndex +1]]] timeProfile] fork

• TDBMemorySimulator: introduce PrimitiveHandlers cache that maps set of requirements values (shouldIsolate etc.) to dictionary of handler blocks that take aSimulator as their first argument
• Build something similar for pragmaPrimitives
• Consider caching capabilityPragmas in SimulationStudio