disable coalesce for gossip

[alexpyattaev]

Problem

• solRcvrGossip is using over 80% of a core (just pulling packets from a socket)
• allows reading from the socket with no max_wait #5213 enables a more efficient way to drain sockets

Summary of Changes

• Remove the coalesce from the streamer in solRcvrGossip

Result is 20% core use by solRcvrGossip (4x reduction) and increases amount of batches sent to downstream code by 4x (left part before the gap is master, right part after gap is this PR)

Overall, it is a good question if we want fewer batches or lower CPU load of solRcvrGossip thread in particular.

Fixes #
#5034

[alexpyattaev]

@behzadnouri do you think this is a good tradeoff?