* Removes D3D11 Warp and Reference configs from tests.
* Removes several permutations of OpenGL back-end specific configs.
* Removes FL 9_3 since it is no longer supported.
* Removes present path "Copy" since it's redundant with normal D3D11.

Reduces number of configs from over 60 to 25.

Bug: angleproject:3393
Change-Id: Ia5a23de3c4865b17ee50673a4066757b901a4b5a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1574675
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>