- Always return a MaybeLocal<String>
- Don't crash on long filenames

Bug: chromium:1311923
Change-Id: I96e10337ceb32aeafafe0b73c78651a1ac38fb9f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3576122Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79859}