Provide tokenIdToHashSeed consistency in V3

[jakerockland]

Description of the change

Update CoreV3 for flagship and explorations to both support tokenIdToHashSeed and version bump to 3.1.0 / 3.1.1.

Additionally, refactor out a shared IGenArt721CoreContractExposesHashSeed interface to be used across all contracts that conform to this, removing it from the _Engine-specific core contract interface (this is safe, as no reliance on said interface outside of compile-time reliance is currently used – e.g. no usage in our subgraph, etc.).

[ryley-o]

In the interest of maintaining a reference to the solid understanding of our as-deployed flagship and explorations contracts, while also supporting any new deployments with these changes in our subgraph, I think the following might make sense:

• make a new IGenArt721CoreContractV3p1 that is IGenArt721CoreContractV3, with the added new view function tokenIdToHashSeed defined in the interface

edit - discussed alternate solution offline that seems better

[jakerockland]

In the interest of maintaining a reference to the solid understanding of our as-deployed flagship and explorations contracts, while also supporting any new deployments with these changes in our subgraph, I think the following might make sense:

• make a new IGenArt721CoreContractV3p1 that is IGenArt721CoreContractV3, with the added new view function tokenIdToHashSeed defined in the interface

edit - discussed alternate solution offline that seems better

Updated to account for our discussion ser, re-requesting review 🙏

[jakerockland]

@yoshiwarab moving you to CC, I don't think this PR actually needs multi-review.

cc @shantanubala as well.

[ryley-o]

LGTM - Cc @lyaunzbe as this is a change that needs to be in the new polyptych minter 👍