d3d11videosink: Don't use default colorimetry assumed by GstVideoInfo

Video resolution based colorimetry derivation in GstVideoInfo implementation tends to result in visually very wrong (saturated or too dark) image, especially when SDR image is handled as if it's wide gamut oriented ones and vice versa. Basically such wide gamut image should inform its intended colorimetry in a very explicit way. So, if it's not specified, d3d11videosink will assume input stream as a common SDR format BT709.

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