improve error log when attempting to relay redundant packets

[jtieri]

The error logged when the relayer attempts to relay packets already handled by another relayer is very verbose and for an inexperienced operator this can look like something that requires intervention when in reality it is a normal situation to observe.
We should clean this up and make it clear that there is nothing to be done.

ex:

2023-03-22T16:43:02.481620Z     error   Failed sending cosmos transaction       {"provider_type": "cosmos", "chain_id": "osmosis", "msg_types": ["/ibc.core.client.v1.MsgUpdateClient", "/ibc.core.channel.v1.MsgAcknowledgement"], "error": "packet messages are redundant", "errorVerbose": "packet messages are redundant\ncosmossdk.io/errors.Wrap\n\t/home/laurens/go/pkg/mod/cosmossdk.io/errors@v1.0.0-beta.7/errors.go:187\ncosmossdk.io/errors.ABCIError\n\t/home/laurens/go/pkg/mod/cosmossdk.io/errors@v1.0.0-beta.7/errors.go:75\ngit.luolix.top/cosmos/relayer/v2/relayer/chains/cosmos.(*CosmosProvider).sdkError\n\t/home/laurens/quasar-finance/relayer/relayer/chains/cosmos/tx.go:170\ngit.luolix.top/cosmos/relayer/v2/relayer/chains/cosmos.(*CosmosProvider).broadcastTx\n\t/home/laurens/quasar-finance/relayer/relayer/chains/cosmos/tx.go:206\ngit.luolix.top/cosmos/relayer/v2/relayer/chains/cosmos.(*CosmosProvider).SendMessagesToMempool\n\t/home/laurens/quasar-finance/relayer/relayer/chains/cosmos/tx.go:152\ngit.luolix.top/cosmos/relayer/v2/relayer/processor.(*messageProcessor).sendSingleMessage\n\t/home/laurens/quasar-finance/relayer/relayer/processor/message_processor.go:439\nruntime.goexit\n\t/home/laurens/.go/src/runtime/asm_amd64.s:1594"}