feat!: split compute note hash and nullifier to reduce hashing (backport #21639)#21717

AztecBot wants to merge 7 commits intobackport-to-v4-next-stagingAztecProtocol/aztec-packages:backport-to-v4-next-stagingfrom

claudebox/backport-21639-split-note-hash-nullifierAztecProtocol/aztec-packages:claudebox/backport-21639-split-note-hash-nullifierCopy head branch name to clipboard