Add Resize field; Fix Clip and Upscale2D layer

[MaximKuklin]

• Add Resize key to AVAILABLE_CONVERTERS as convert_upsample function
• Add additional Clip logic in case if min and max params are contained in available layers, not in node.attributes
• Resize params are extracted from node.input[2], not from node.input[1]. By some reason, it didn't work with node.input[2] as it is empty. Looks like in new versions the position of resize params has changed