[JitDiff ARM64] [Copilot] Replace ExtractMostSignificantBits+BitOp patterns with Vector helper methods

Started at 2026-04-13 22-07-26 UTC, ran for 17 minutes 15 seconds.
Tracking issue: https://github.com/MihuBot/runtime-utils/issues/1848
You can download the logs here.

Arguments: -arm


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