blockifier,starknet_os: expect the blake constants in tests and check consistency

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• blockifier,starknet_os: expect the blake constants in tests and check consistency #14035 👈 (View in Graphite)
• starknet_os: recompute and assert the blake constants #14032 : 1 other dependent PR (#14033 )
• blockifier: fix blake estimation offset by fixing constants #14034
• starknet_os: move blake constants to struct scope #14031
• starknet_os: extract cairo blake run to function #14030
• main

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• Started at 2026-05-16T10:02:54Z
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PR Summary

Low Risk
Low risk: changes are limited to test infrastructure and Cargo feature wiring, with no functional changes to hashing or execution logic. Main risk is potential build/feature configuration issues from the new optional expect-test dependency.

Overview
Adds expect-test-based golden expectations for CASM V2 (Blake) hash step estimation constants, exposing them via a new #[cfg(test, feature = "testing")] expected module alongside CasmV2HashResourceEstimate.

Updates Blockifier and Starknet OS Blake tests to assert against these expectations (instead of hard-coded equality) and adds a consistency test ensuring the production constants remain in sync with the expected baselines. Also wires expect-test into Blockifier’s testing feature as an optional dependency.

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@dorimedini-starkware resolved 2 discussions.
Reviewable status: 0 of 4 files reviewed, all discussions resolved (waiting on AvivYossef-starkware and Yoni-Starkware).