Parameter validation layer does not account for extended enums

[kbenzie]

Validation of ur_mem_type_t, which is extended by the experimental bindless images feature, does not correctly validate the extended enumeration UR_MEM_TYPE_IMAGE_CUBEMAP_EXP.

        if (pImageDesc && UR_MEM_TYPE_IMAGE1D_ARRAY < pImageDesc->type) {
            return UR_RESULT_ERROR_INVALID_IMAGE_FORMAT_DESCRIPTOR;
        }

typedef enum ur_mem_type_t {
    UR_MEM_TYPE_IMAGE2D = 0,                ///< 2D image object
    UR_MEM_TYPE_IMAGE3D = 1,                ///< 3D image object
    UR_MEM_TYPE_IMAGE2D_ARRAY = 2,          ///< 2D image array object
    UR_MEM_TYPE_IMAGE1D = 3,                ///< 1D image object
    UR_MEM_TYPE_IMAGE1D_ARRAY = 4,          ///< 1D image array object
    UR_MEM_TYPE_IMAGE_CUBEMAP_EXP = 0x2000, ///< Experimental cubemap image object
    /// @cond
    UR_MEM_TYPE_FORCE_UINT32 = 0x7fffffff
    /// @endcond

} ur_mem_type_t;

This results in valid usage of the bindless images entry points which take a ur_mem_type_t returning the UR_RESULT_ERROR_INVALID_IMAGE_FORMAT_DESCRIPTOR erroneously.

Given the gap in valid values, validation should instead look like this:

        if (pImageDesc) {
            switch (pImageDesc->type) {
            case UR_MEM_TYPE_IMAGE2D:
            case UR_MEM_TYPE_IMAGE3D:
            case UR_MEM_TYPE_IMAGE2D_ARRAY:
            case UR_MEM_TYPE_IMAGE1D:
            case UR_MEM_TYPE_IMAGE1D_ARRAY:
            case UR_MEM_TYPE_IMAGE2D:
            case UR_MEM_TYPE_IMAGE_CUBEMAP_EXP:
                break;
            default:
                return UR_RESULT_ERROR_INVALID_IMAGE_FORMAT_DESCRIPTOR;
            }
        }

[aarongreig]

Closing #2310 as it's pretty much this. We've fixed the thing with exp values not generating in ur_valddi.cpp but the gap in values is still a problem, and we should really update the validation to use a switch or something similar as described above.