starknet_os: os resources test - add keccak

[dorimedini-starkware]

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[dorimedini-starkware]

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• starknet_os: os resources test - add send_message_to_l1 #14143 : 2 dependent PRs (#14144 , #14153 )
• starknet_os: os resources test - add replace_class #14142
• starknet_os: os resources test - support virtual builtins, add sha256 #14141
• starknet_os: define sha256 batch resources constants #14140
• starknet_os: os resources test - add keccak #14139 👈 (View in Graphite)
• starknet_os: os resources test - add 3 more syscalls #14138
• starknet_os: os resources test - remove all fee transfer syscalls #14137
• starknet_os: os resources test - add emit event #14136
• starknet_os: os resources test - add meta tx #14135
• starknet_os: os resources test - measure linear factor, add deploy #14134
• starknet_os: os resources test - library call #14129
• starknet_os: initial test, measure call contract resources #14128
• blockifier_test_utils: add option to deploy from zero in test accounts #14258
• starknet_os_flow_tests: helper function to declare explicit classes #14257
• starknet_os: os resources test - create fixed deployable account #14173
• main

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PR Summary

Medium Risk
Changes fee/OS resource accounting and allowed virtual OS program hashes, which affect proving and gas metering consistency across the network stack.

Overview
Extends the OS resources regression harness to measure Keccak (empty input for base cost, 17×u64 for one round) and records Keccak / KeccakRound in versioned constants, with special handling because round cost is stored under KeccakRound rather than a calldata factor on Keccak.

Bumps OS and virtual OS program hashes (program_hash.json, Cairo ALLOWED_VIRTUAL_OS_PROGRAM_HASHES_2, and 0.14.4 allowed hashes) and raises KECCAK_ROUND_COST_GAS_COST (171707 → 175207) and KeccakRound n_steps (281 → 316) to match the rebuilt OS.

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[Yoni-Starkware]

@Yoni-Starkware reviewed 6 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).

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