streamer should implement the community pool interface

[mtsitrin]

Following the streamer concept, and in sync with the cosmos-sdk v50 refactor, the streamer module should act as the community pool interface provider, instead of the distribution module. by implementing the interface, other modules that can send funds to the community pool, would send the funds to the streamer.

Need to add for streamer the ability to send funds directly to an address, same as distribution's community pool