Disable vendor formats for cl_ext_image_from_buffer tests, e.g: CL_NV21 from cl_img_yuv_image.

[AhmedAmraniAkdi]

Hi,

Should we limit the cl_ext_image_from_buffer tests to only the core formats of the specification? In the same way the other image kernel_read_write do with filter_formats?

For format like YUV (E.g. CL_NV21_IMG), the verification step is incorrect.

Ahmed.