starknet_os: os resources test - create fixed deployable account

[dorimedini-starkware]

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

PR Summary

Low Risk
Test-only fixtures and setup in starknet_os_flow_tests; no production runtime or security paths changed.

Overview
Adds a pinned dummy Starknet account contract (deployable_for_resource_measurement) with checked-in Sierra/CASM artifacts (compiler v2.17.0) so deploy-related OS resource measurements stay stable when the main Cairo toolchain moves.

special_contracts.rs exposes lazy-loaded Sierra/CASM handles for that class. test_os_resources_regression now declares it on-chain from FUNDED_ACCOUNT_ADDRESS (with V2 compiled class hash and ClassInfo) before advancing to the block that runs syscall measurement, so the measurement harness can deploy a known class instead of one that would change with recompiles or address normalization.

^{Reviewed by Cursor Bugbot for commit 91c50c1. Bugbot is set up for automated code reviews on this repo. Configure here.}

[Yoni-Starkware]

@Yoni-Starkware reviewed 5 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).