Use Kafka consumer pool always, if it is there

[a1exsh]

1. For misc we always want to use the consumer pool to reduce the rate of creating consumers.
2. For the actual consumption stack we will be creating consumers normally.

[a1exsh]

:+1:

[adyach]

it is unexpected that pool can be 0 size, but making decision to create consumer or take from the pool at the timelag checker level requires a lot of code changes, os we agreed to remake it if it has positive effect.

[adyach]

👍