[partition_alloc] Increase amount of spinning in locks on ARM This change adds a feature to increase the amount of spinning in user space before a thread waits in the kernel on ARM64 devices to match with x64 devices. Bug: 458028996 Change-Id: I152adfc6c666a8f1bddbba0db91816d9e794b32d Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7209389 Reviewed-by: Benoit Lize <[email protected]> Commit-Queue: Anand Ravi <[email protected]> Cr-Commit-Position: refs/heads/main@{#1553586} NOKEYCHECK=True GitOrigin-RevId: d2c67cca04c76e2b5afde23dd298ba4aab1efec1