Return non redacted error content on IBC packet recv

[alpe]

Current response in json is: {"error":"ABCI code: 5: error handling packet: see events for details"}
Instead of the default error constructor, we could pass the string directly

Note: Only for this case: https://github.com/CosmWasm/wasmd/blob/v0.31.0/x/wasm/keeper/relay.go#L135-L136

See also #1220

[alpe]

Does it make sense to prevent empty error strings? Technically it is not an issue and would save some gas for the relayer.
ICS-29 fees should give an incentive for short messages

[0xekez]

this would be a really nice feature 🙏