d3d11: Allow binding R/RG texture to EGLImage Also allows GL_RED/RG/R16/RG16_EXT as well as GL_RGB10_A2_EXT which was left out previously by accidently to match Chromium behavior. Adapts the existing ClearTextureImage test to parameterize over a number of texture formats. Bug: angleproject:6369 Change-Id: I91110a06b08379a3067a2161e345258415cd5e16 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3140744 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>