DataHash is used but not set on sdk v0.50 for ica account creation

[damiannolan]

Summary

Interchain accounts uses DataHash as a source of entropy for account creation.
See https://github.com/cosmos/ibc-go/blob/main/modules/apps/27-interchain-accounts/types/account.go#L52

This field is not set in the header in cosmos-sdk v0.50 and above.
https://github.com/cosmos/cosmos-sdk/blob/v0.50.13/baseapp/abci.go#L709-L716

AppHash should still be fine here. Just wanted to notify about this.

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[gjermundgaraba]

That is a good point. If AppHash is enough we can probably just get rid of that line to avoid confusion?