JVET-AD0233 Items 1,2,6: Add NNFPC constraints and chroma sample location

This MR addresses the following items listed in the mail: Item 18: Add a constraint on NNPF input tensor and output tensor bit depth values to avoid changing in opposite directions from input to output. Item 31:Add a constraint that disallows nnpfc_inp_order_idc indicating that the input tensor has chroma component when ChromaFormatIdc is equal to 0. Item 36:Add a syntax element indicting the location of chroma samples