add identityManager v3 with modified verifyProof impl

[karankurbur]

Context:
We are looking at ways to reduce the calldata posted from World Chain -> l1 blobs/calldata to reduce cost and increase scalability. A large percentage of World Chain transactions have a ZKP which can be compressed from 8 uints to 4 uints. The Sempahore Verifier contract has a verifyCompressedProof function that can be called directly. We want to create a backwards compatible way to reduce the proof size as well as introduce an explicit function for verifying compressed proofs. We make this backwards compatible by checking the last four uints, if they are all 0 we can assume this proof is compressed and we should call the appropriate function. The addeded verifyCompressedProof should be used in all new smart contracts.

Changes

• Create WorldIDIdentityManagerImplV3.sol with updated verifyProof implementation. If the last 4 uints in the proof are 0, it will call SempahoreVerifier.verifyCompressedProof
• Add verifyCompressedProof function
• Update unit tests to explicitly specify IdentityManagerv2

Deployment

• No additional initializer methods
• Deploy the v3 contract and update through the UUPS proxy via upgradeTo on WorldIDIdentityManager

[0xOsiris]

Do we want to also expose a verifyCompressedProof function that can just take as calldata the compressed proof in the upgrade?

[0xForerunner]

Do we want to also expose a verifyCompressedProof function that can just take as calldata the compressed proof in the upgrade?

Seems like a good idea I think.