One failed message in transactions makes whole batch fail

[KonradStaniec]

Currently if one messge with sigantures fail then the whole batch fail and it is never retried again without this bad message - https://github.com/babylonlabs-io/covenant-emulator/blob/v0.11.1/covenant/covenant.go#L228

Ideally covenant emulator would:

• send transaction with batch of messages
• if tx fail due to one bad message in the batch, this message should be identified and excluded from the batch, and then whole batch should be retried again

[RafilxTenfen]

usual error

expected err when submitting the tx, skip retrying	{"error": "rpc error: code = Unknown desc = rpc error: code = Unknown desc = failed to execute message; message index: 0: the covenant signature is already submitted [cosmos/[email protected]/baseapp/baseapp.go:1023] with gas used: '55521': unknown request"}