chore: acir format cleanup

[charlielye]

• Refactor to remove redundancy in acir format (there used to be 4 copy pastes of 1 big function. shocking).
• Remove composer_ as member var from acir composer for greater safety.
• Fix a bug in the RAM constraint whereby setting invalid witness to true, hard baked a 0 constant into the pk causing subsequent runs to fail.

[AztecBot]

Benchmark results

All benchmarks are run on txs on the Benchmarking contract on the repository. Each tx consists of a batch call to create_note and increment_balance, which guarantees that each tx has a private call, a nested private call, a public call, and a nested public call, as well as an emitted private note, an unencrypted log, and public storage read and write.

L2 block published to L1

Each column represents the number of txs on an L2 block published to L1.

Metric	8 txs	32 txs	128 txs
l1_rollup_calldata_size_in_bytes	45444	179588	716132
l1_rollup_calldata_gas	222948	867824	3448136
l1_rollup_execution_gas	842035	3594932	22203505
l2_block_processing_time_in_ms	1027	3903	15440
note_successful_decrypting_time_in_ms	326	997	3678
note_trial_decrypting_time_in_ms	29	106	138
l2_block_building_time_in_ms	8979	35885	150477
l2_block_rollup_simulation_time_in_ms	6674	26660	106188
l2_block_public_tx_process_time_in_ms	2265	9098	43819

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 16 txs.

Metric	10 blocks	20 blocks	30 blocks
node_history_sync_time_in_ms	31234	75943	135871
note_history_successful_decrypting_time_in_ms	4721	13054	19958
note_history_trial_decrypting_time_in_ms	147	241	269
node_database_size_in_bytes	1193018	3392072	2753980
pxe_database_size_in_bytes	54187	108338	162578

Circuits stats

Stats on running time and I/O sizes collected for every circuit run across all benchmarks.

Circuit	circuit_simulation_time_in_ms	circuit_input_size_in_bytes	circuit_output_size_in_bytes
private-kernel-init	57.421779141104295	56577	14745
private-kernel-ordering	30.162576687116566	20137	8089
base-rollup	869	631604	810
root-rollup	37.853658536585364	4072	1097
private-kernel-inner	52.14969135802469	72288	14745
public-kernel-private-input	51.70216049382716	37359	14745
public-kernel-non-first-iteration	30.73070987654321	37401	14745
merge-rollup	1.0426356589147288	2592	873