Since some apps will change the app hash every block, even with empty blocks, setting create_empty_blocks=false won't achieve anything.

To solve this, we could add a Pause bool field to ResponseEndBlock that tells Tendermint whether to make a new block right away or not.

We should write a proper ADR before making this change. Note that any state transitions that occur in the last block committed will not have light-client proofs until the next block is committed, so apps need to be careful when setting Pause=true