chore: support auto sharding and static sharding

[richard-ramos]

Background

waku-org/nwaku#2420

Pre-requisite

waku-org/nwaku#2456

###Details

Once the pre-requisite is satisfied, it should straightforward to use the auto sharding or static sharding in the waku node. In this issue we will implement and example that will help give evidence of that feature working properly.