Test stateless execution for cosmos-sdk baseapp using SMT-based fraudproofs

[Manav-Aggarwal]

As part of the fraudproof cycle described in #245, we'd like to be able to test stateless execution for a cosmos-sdk baseapp by using fraudproofs based on the new multistore with SMTs.

Parts covered from the cycle of a fraudproof:

Optimint Full Node (Producer of fraudproof)
3. The cosmos-sdk will simply execute the fraudulent block while logging all the states touched by the transaction. This minimial snapshot will be packaged as a fraudproof and passed back to optimint.

Optimint Full/Light Node (Verifier of fraudproof)
3. Now, it spins up a fresh cosmos-sdk and tells it to initialize with the fraudproof which is essentially a minimal snapshot sufficient to execute the fraudulent block.

Parent issue: #245

[Manav-Aggarwal]

Closed by: rollkit#1