Drive-by-fixes:
- Auto-create the --perf-data-dir

Change-Id: I6801452f9c4c6b9069a29aa3ab1e25909adffb19
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3893858
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83161}