[EPIC] AVM simulator & witgen process all enqueued calls for a TX

[dbanks12]

Multiple nested calls in one circuit

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1. Witgen manages context per-nested call including tree roots
2. Witgen executes nested contract calls & returns
3. In witgen, nested calls access parent's memory for calldata (with range checks to avoid accesses outside of calldata)

Multiple enqueued calls in one circuit

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1. feat: trace AVM side effects per enqueued call #8918
   +0
2. feat: enforce limits for each side effect type in AVM #8889
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3. Spec VM public inputs struct for full TX
4. Spec hints for full TX
5. Simulator processes multiple enqueued calls & handles "phases"
6. Simulator provides hint (including calldata) & public input (PublicCallRequest) to witgen for each enqueued call
7. Spec VM public inputs columns & hints columns for full TX
8. Witgen accepts multiple enqueued calls (PublicCallRequests) in public inputs
9. Witgen can execute multiple enqueued calls
10. Witgen supports different "phases" of public execution
11. Related Epic: [EPIC] AVM simulator & witgen perform all tree accesses, siloing & preimage hashing #9444
12. Related Epic: Epic: Simulating all enqueued calls  #9290

[dbanks12]

Done!