- Unhandlify OSROptimizedCodeCache::GetOptimizedCode.
- Unstatic-fy FeedbackVector::SetOptimizedCode.
- Remove frame-walking logic during the OSR tierup decision.

Bug: v8:12161
Change-Id: I4fa8c972cb50d369b17898ba57e1909c86e933df
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3560478Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79686}