Update the TRex trace to:
* Incorporate recent fixes for compressed textures
* Incorporate support for compressing the trace
* Simplify the tag on the trace (drop the end frame)

Update TracePerfTest to:
* Temporarily support only a single trace (TRex200).

Test: angle_perftests --gtest_filter="*Trace*"
Bug: angleproject:4484
Bug: angleproject:4488
Bug: angleproject:4496
Change-Id: Ice0c4ee9de3ad9ae4596305a93c51c6eac842123
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2112629
Commit-Queue: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>