Split multiple (>2) brnached cartesian product with filter

[DvirDukhan]

Introduce new optimization for filter re-ordering filters that are after a multiple branched cartesian product. The optimization should create a dual-branched cartesian product, followed by the filter as a child of the original cartesian product.

for example the query MATCH (a), (b), (c) WHERE a.x>b.x RETURN a, b, c

a    b   c
|    |   |
 \   |   /
    CP
     |
 filter (a.x > b.x)

will be optimized by

a   b
|    |
 \  /
   CP 
    |
 filter (a.x > b.x)    c
                  |    |
                   \  /
                   CP 

[DvirDukhan]

closed by #906