fix: init bb.js sync singleton before subsystems start in createAndSync#24147

PhilWindle merged 2 commits into

merge-train/spartan-v5AztecProtocol/aztec-packages:merge-train/spartan-v5from

phil/a-1243-init-bb-singleton-in-createandsyncAztecProtocol/aztec-packages:phil/a-1243-init-bb-singleton-in-createandsyncCopy head branch name to clipboard