This moves the resource use tracking functionality out of CommandGraph.
Making the list a separate class helps the implementation avoid tricky
circular include problems.

Bug: angleproject:4029
Change-Id: I3288fc685b21e949f12b0796109a2b7bb117c249
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2002931Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>