Creates Torque classes for JSProxy, JSAccessorPropertyDescriptor, JSCollection, JSProxyRevocableResult, JSValue

Change-Id: I01eec27b158b4beb778cb5efce44f241c09ef0f7
Reviewed-on: https://chromium-review.googlesource.com/c/1489184
Commit-Queue: Irina Yatsenko <irinayat@microsoft.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59921}