Fix internal format/type for 3D + depth/stencil negative API tests.

Fix internal format/type for 3D + depth/stencil negative API tests.

According to the ES 3.2 specification:

   "Textures with a base internal format of DEPTH_COMPONENT, DEPTH_STENCIL
    or STENCIL_INDEX are supported by texture image specification commands
    only if target is TEXTURE_2D, TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_ARRAY,
    TEXTURE_2D_MULTISAMPLE_ARRAY, TEXTURE_CUBE_MAP or TEXTURE_CUBE_MAP_ARRAY.
    Using these formats in conjunction with any other target will result in
    an INVALID_OPERATION error."

This subtest tried to check the above error condition, but it specified
GL_DEPTH_STENCIL / GL_DEPTH_COMPONENT as format, rather than internalFormat.
Since the above text calls out "base internal format", we should specify
it as internalFormat.

We also change GL_DEPTH_STENCIL to use GL_UNSIGNED_INT_24_8 rather than
GL_UNSIGNED_BYTE, as that combination was illegal for a different reason
than the one the test intended to check.