Compile time optimizations

[swilly22]

Seperate execution plan optimisations into compile time optimizations and runtime optimizations
Compile time optimizations are cached.

Compile time optimizations:

1. reduceScans
2. compactFilters
3. filterVariableLengthEdges
4. reduceCartesianProductStreamCount
5. applyJoin
6. reduceTraversal
7. reduceDistinct
8. reduceCount

Runtime optimizations:

1. utilizeIndices
2. optimizeLabelScan
3. seekByID
4. reduceFilters
5. applyLimit
6. applySkip

[AviAvni]

there is already one like this called ExecutionPlan_isEager

[swilly22]

A bit confusing but ExecutionPlan_isEager checks to see if the Execution-Plan spanned from the given root contains an eager operation while OpBase_IsEager checks if the given operation is an eager op.