[PA/AC] UI thread specific capacity configuration for quarantine

As we are planning to start an experiment over PartitionAlloc with
Advanced Checks (PA/AC) in the browser UI thread only, it should be
capable of thread-type-aware capacity configuration.
This CL will add single FeatureParam which is UI-thread specific
quarantine capacity value.

Bug: 351974425, 387470567
Change-Id: I66bb24d051bdbf684ae5848351bd8c0bb1903539
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6151471
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Mikihito Matsuura <mikt@google.com>
Cr-Commit-Position: refs/heads/main@{#1403352}
NOKEYCHECK=True
GitOrigin-RevId: e92ef522a4d574e9da58f07b2fa1f2d34a8b18b2
1 file changed