Update layered navigation behavior to 'or' within a filterset and 'and' multiple filtersets

[maghamed]

As a customer I should be able to create complex filters using the layered navigation so that I can find what I'm looking for quicker.
Note:

• example use case a customer sets category = "shoe', sets color to be both 'brown' and 'black'; results should be filtered as if category = shoe and color in ('brown','black).

AC:

• Update behavior of selections within a filterset to be the same as an 'or' of those filterset selections
• Update behavior when items are selected among multiple filtersets so that filter sets are 'and' ed together

GitHub issue #9096