blockifier: raw VC to_string_pretty

[dorimedini-starkware]

No description provided.

[dorimedini-starkware]

• blockifier_test_utils: add OS resources measurement contract #14126 : 2 dependent PRs (#14127 , #14128 )
• blockifier: regenerate VC JSONs #14133
• blockifier: raw VC to_string_pretty #14132 👈 (View in Graphite)
• blockifier: raw VC deterministic map order #14131
• blockifier: raw VC serde equivalence test #14130
• main

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[reviewable-StarkWare]

This change is 

[cursor]

PR Summary

Low Risk
Low risk: test-only change that alters how RawVersionedConstants is pretty-serialized to JSON, with no runtime behavior impact outside tests.

Overview
Adds a test-only RawVersionedConstants::to_string_pretty() that pretty-prints JSON with a fixed 4-space indent via a custom serde_json formatter.

Updates the roundtrip serde test to use this helper instead of serde_json::to_string_pretty, making the expected serialization format explicit and consistent.

^{Reviewed by Cursor Bugbot for commit 9e3ca3f. Bugbot is set up for automated code reviews on this repo. Configure here.}

[Yoni-Starkware]

@Yoni-Starkware reviewed 2 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).

[github-actions]

Artifacts upload workflows:

• Started at 2026-05-24T11:29:23Z
• Started at 2026-05-24T11:29:54Z
• Started at 2026-05-24T11:41:09Z

[graphite-app]

Merge activity

• May 24, 11:29 AM UTC: Graphite rebased this pull request, because this pull request is set to merge when ready.

[dorimedini-starkware]

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