[EPIC] AVM processes an entire enqueued call

[dbanks12]

### Tasks
- [ ] https://github.com/AztecProtocol/aztec-packages/pull/8918
- [ ] https://github.com/AztecProtocol/aztec-packages/pull/8889
- [ ] Spec VM public inputs struct for enqueued calls
- [ ] Spec VM public inputs columns for enqueued calls
- [ ] Spec & implement AVM circuit changes
- [ ] Spec hints for enqueued calls, implement in simulator & circuit
- [ ] Enforce limit on number of (unique?) nested calls
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/8287

### Related
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/7124