fix: validator doesn't participate in consensus

[joske]

Motivation

the problem is that when the current round is sent to the bft using bft_sender.send_primary_round_to_bft(current_round).await, if this returns true, the primary starts to propose batches. The problem is that it also returns true when the storage fails to increment to next round. If this returns false, it fixes the issue (well the one I was seeing, where the 4th node syncs but can't participate in consensus)

Test Plan

steps to reproduce (without the fix):

• clear the local ledger
• start 3 nodes and wait for about 30 rounds
• start 4th node
• notice that it syncs up, but not quite, and doesn't participate in consensus and keeps on resending an old batch

with the fix:

• 4th node syncs and starts to participate in consensus

Related PRs

#3074