Avoid local pub sub subscription cancellations

[danwt]

When using buffered channels the subscription gets cancelled if the channel gets full

We need to decide on a solution

See https://github.com/dymensionxyz/dymint/pull/773 for discussion and context

cc @omritoptix

[srene]

just mention that unbuffered channels are still used here https://github.com/dymensionxyz/dymint/blob/94267ae551de46bda60898c23f5092125e60aca6/utils/event/funcs.go#L24, mainly for block received events from p2p. although IMO is better to use unbuffered here to avoid the risk of canceling and therefore stop syncing.

[danwt]

@srene Do you think we have any more problems stemming from this? Or should we close the issue?

[srene]

i think this can be closed