fix(avm): Make the TS simulator lazy read calldata / return data#19843
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BEGIN_COMMIT_OVERRIDE fix: SLOAD fuzzing after configurable addr (#19895) fix(avm): Make the TS simulator lazy read calldata / return data (#19843) chore(avm): ECC pre-audit gadget fuzzing (#19739) fix: Fuzzer sometimes creates to radix with num_limbs=0 (#19929) fix: Enforce recipients of l2l1msgs having 20 bytes at most (#19898) fix merge conflict END_COMMIT_OVERRIDE
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Resolves https://linear.app/aztec-labs/issue/AVM-208/wrap-calldatareturndata-in-ts-simulator-in-a-lazy-reader-class
Adds an interface for lazily read calldata and returndata. Creates two classes that implement the interface, an array backed one and a memory backed one. Internal calls use the memory backed one and the top level calldata uses the array backed one. In the memory one, memory is accessed at read time, instead of at creation time like we did before.
This should fix the largest diff that we have right now between the TS and CPP versions of the simulator, that is the lazy behavior of calldata and returndata, unblocking the differential fuzzer.