This moves the trace header inclusion to the cpp file so that the
test itself doesn't need to look at the individual trace headers.
This fixes an include directory dependency. Also removes the FBO
change callback from the generated traces.

Bug: angleproject:4845
Change-Id: I019f0d347a62a81b92bf32110572911111212689
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2314217Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>