Add Intersection + Union Benchmarks

[PSeitz]

Add benchmarks to test different intersection and union combinations

Nested Intersection + Union (to cover multi field search)

Intersection of different query types: Term, FastField, Phrase etc.

intersection between two terms.

The first term matches 0..1_000_000.
The second term is matching docs 1_000_000..10_000_000.

a more like scenario could be
first term matches 0..1_000_000
second term is random.

This kind of problem actually happen in reality when document are ordered in a certain way.
For instance, eBay and Indeed are sorting by location.
We often sort by time, which is correlated in strange ways (for instance you can think of status:ERROR).