With this commit, we update all the resolvers to pass in the new htlc
resolution blobs. Along the way, we remove the old blocking guard on
this resolution logic for HTLCs with blobs.
In this commit, we consolidate the _lease specific_ logic for the
success and timeout HTLC resolvers. We do this with the addition of a
new struct which is then composed via struct embedding with the two
existing structs. This fixes a flake in the integration tests by
ensuring the height is set up front, rather than eventually once the
height matches the lock time.
