fix: Fix rebuild pattern slashes.

[charlielye]

A broken approach had been taken to our rebuild patterns.
They were not actually regular expressions, as they had had double backslashes inserted in order to handle the fact that awk in "awk -v" mode requires c-string style patterns, which means the slashes needed to be escaped.
This meant the patterns didn't work right in any other regex context such as when using "grep -E".
This fix normalises the patterns into standard regex format, and in content hash generation, we now perform the escaping of slashes there for awk.

[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.

This benchmark source data is available in JSON format on S3 here.

Values are compared against data from master at commit 5585075f and shown if the difference exceeds 1%.

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	45,444	179,588	716,132
l1_rollup_calldata_gas	223,020	868,328	3,449,444
l1_rollup_execution_gas	842,107	3,595,436	22,204,813
l2_block_processing_time_in_ms	1,072 (+5%)	4,047 (+3%)	16,072 (+6%)
note_successful_decrypting_time_in_ms	342 (+6%)	1,058 (+7%)	3,823 (+7%)
note_trial_decrypting_time_in_ms	⚠️ 43.0 (+65%)	109 (+10%)	138
l2_block_building_time_in_ms	9,214 (+3%)	36,780 (+2%)	156,562 (+5%)
l2_block_rollup_simulation_time_in_ms	6,868 (+4%)	27,365 (+3%)	109,318 (+4%)
l2_block_public_tx_process_time_in_ms	2,305 (+2%)	9,283 (+2%)	46,742 (+8%)

L2 chain processing

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

Metric	5 blocks	10 blocks
node_history_sync_time_in_ms	14,196 (+1%)	30,726
note_history_successful_decrypting_time_in_ms	2,363 (+4%)	4,717 (+6%)
note_history_trial_decrypting_time_in_ms	123 (+2%)	⚠️ 153 (-26%)
node_database_size_in_bytes	1,647,582	1,191,891
pxe_database_size_in_bytes	27,188	54,187

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	44.5 (+3%)	56,577	14,745
private-kernel-ordering	21.5 (+1%)	20,137	8,089
base-rollup	854	631,605	811
root-rollup	38.2 (-1%)	4,072	1,097
private-kernel-inner	36.9 (+4%)	72,288	14,745
public-kernel-private-input	47.9 (+2%)	37,359	14,745
public-kernel-non-first-iteration	28.7 (+2%)	37,401	14,745
merge-rollup	0.848 (-2%)	2,592	873

Miscellaneous

Transaction sizes based on how many contracts are deployed in the tx.

Metric	0 deployed contracts	1 deployed contracts
tx_size_in_bytes	8,723	27,094