Fix invalid combinations for texture/copy on ES2 driver

Fix invalid combinations for texture/copy on ES2 driver

OES_packed_depth_stencil describes the valid combinations available.
Texturing is only valid from it when OES_depth_texture is also present.
ES3 added depth texturing, but used different tokens than the initial
extension.

Affects:

KHR-GLES2.core.internalformat.texture2d.
  depth_stencil_unsigned_int_24_8_depth24_stencil8
KHR-GLES*.core.internalformat.texture2d.
  depth_stencil_unsigned_int_24_8_depth_stencil

Components: OpenGL
VK-GL-CTS issue: 1261

Change-Id: I91262c2c7eb71c9d3ff1eb59931227132b1828f9
(cherry picked from commit 33af336e530859e099df76b4c7d4acc5add3c2f7)