- normalize relative paths with parent segments
- load .js and .mjs files automatically when using
  --fuzzy-module-file-extensions

Change-Id: Iac56c6010f1b3450448b98247db88bfa96ae32ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2096629
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66776}