For some reason FFmpeg 5.1.x reverted part of the changes made in 5.0.x on AVCodec. This fix decoding issues with it.
* Remove dependency for FFMpeg.AutoGen Also prepare for FFMpeg 5.0 and 5.1 * Update Ryujinx.Graphics.Nvdec.Dependencies to 5.0.1-build10 * Address gdkchan's comments * Address Ack's comment * Address gdkchan's comment