starknet_os: os resources test - add replace_class

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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 👈 (View in Graphite)
• 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
• 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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[reviewable-StarkWare]

This change is 

[cursor]

PR Summary

Medium Risk
Touches protocol fee/gas constants and OS program hash used for proving; behavior change for replace_class gas billing but scoped to cost alignment and test coverage.

Overview
Adds replace_class to the OS resources regression harness and refreshes its gas/OS cost constants to match measured behavior.

OsResourcesTestContract now invokes replace_class_syscall during __execute__, and ReplaceClass is removed from UNMEASURABLE_SYSCALLS so the flow test compares live OS overhead against versioned constants. ReplaceClass OS steps drop from 106 → 92 in blockifier_versioned_constants_0_14_4.json, with the regression diff file updated accordingly.

OS Cairo sets REPLACE_CLASS_GAS_COST to 10000 (was 10670), the main OS program hash in program_hash.json changes, and the blockifier replace_class positive-flow test expectation for gas_consumed is 13480 (was 14150).

^{Reviewed by Cursor Bugbot for commit 42b29c1. Bugbot is set up for automated code reviews on this repo. Configure here.}

[yoavGrs]

@yoavGrs reviewed 5 files and all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on Yoni-Starkware).