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 - create fixed deployable account #14173
• starknet_os: os resources test - library call #14129
• starknet_os: initial test, measure call contract resources #14128
• blockifier_test_utils: add OS resources measurement contract #14126 : 1 other dependent PR (#14127 )
• blockifier: regenerate VC JSONs #14133
• blockifier: raw VC to_string_pretty #14132
• blockifier: raw VC deterministic map order #14131
• blockifier: raw VC serde equivalence test #14130
• main

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PR Summary

Low Risk
Test harness and fee/resource constant tuning only; no runtime auth or execution-path logic changes beyond updated OS hash and syscall cost tables.

Overview
replace_class is now included in the per-syscall OS resource regression flow instead of being skipped as unmeasurable.

Costs are updated to match measurement: Cairo OS REPLACE_CLASS_GAS_COST drops from 10670 to 10000, blockifier ReplaceClass n_steps from 106 to 92, and program_hash.json reflects the rebuilt OS. The Cairo1 OsResourcesTestContract invokes replace_class_syscall in __execute__, and ReplaceClass is removed from UNMEASURABLE_SYSCALLS in the flow test.

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