starknet_os_flow_tests: move most fuzz test functions to context struct

[dorimedini-starkware]

Note

Low Risk
Primarily a refactor of fuzz-test harness code; risk is limited to potential subtle behavior changes in operation sequencing/serialization used by the flow tests.

Overview
Refactors the fuzz flow test harness so FuzzTestContext owns most stateful logic (call-tree navigation, valid operation generation, apply/revert handling, random op selection, and operation pretty-printing) instead of spreading it across FuzzTestManager.

FuzzTestManager is reduced to deployment/init plus running the test, delegating to context for operation generation and converting operations into orchestrator scenario calldata via a new context.operations_to_scenario_data() helper.

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[reviewable-StarkWare]

This change is 

[dorimedini-starkware]

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This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• starknet_os_flow_tests: fuzz test sha256/keccak scenarios #13052
• starknet_os_flow_tests: fuzz test scenario filtering mechanism #13050
• starknet_os_flow_tests: fuzz test library call nonexisting class scenario #13049
• starknet_os_flow_tests: fuzz test deploy nonexisting class scenario #13048
• starknet_os_flow_tests: fuzz test send message scenario #13047
• starknet_os_flow_tests: fuzz test increment counter scenario #13046
• starknet_os_flow_tests: exhaustive fuzz test #13045
• starknet_os_flow_tests: move most fuzz test functions to context struct #13044 👈 (View in Graphite)
• starknet_os_flow_tests: move deployed fuzz test map to be static #13043
• starknet_os_flow_tests: expect initial fuzz test addresses #13042
• starknet_os_flow_tests: split fuzz test manager from context #13041
• starknet_os_flow_tests: fuzz test TODOs #12971
• starknet_os_flow_tests: long fuzz test #12970
• starknet_os_flow_tests: daily fuzz test #12969
• starknet_os_flow_tests: fuzz test debug printing #12968
• starknet_os_flow_tests: fuzz test panic scenario #12967
• starknet_os_flow_tests: fuzz test enter/exit call #12966
• starknet_os_flow_tests: fuzz test deploy scenario #12965
• starknet_os_flow_tests: fuzz test replace class scenario #12964
• starknet_os_flow_tests: fuzz test current_class_hash method #12963
• starknet_os_flow_tests: fuzz test storage write scenario #12962
• starknet_os_flow_tests: implement FuzzCallInfo::new_call #12961
• starknet_os_flow_tests: fuzz test library call scenario #12960
• starknet_os_flow_tests: fuzz test call scenario #12959
• starknet_os_flow_tests: fuzz test return scenario + infra skeleton #12958
• starknet_os_flow_tests: fuzz test implement test_revert_fuzz skeleton #12957
• starknet_os_flow_tests: fuzz test orchestrator address in contract state #12956
• starknet_os_flow_tests: fuzz test initial contracts #12955
• main-v0.14.2

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