Added 64b66b decoders and RD53 encoders to simulation import scripts and Sigasi import script
requested to merge phase2/Add64b66bdecoderRD53encoder_cleanup2 into phase2/Add64b66bdecoderRD53encoder_cleanup
Some minor fixes in 64b66b_DecodingGearBox.vhd LpGBT_FELIX/FELIX_LpGBT_Wrapper.vhd and sync_timer.vhd Adjusted generics and generate statements to use IC/EC also in PIXEL mode in decoding.vhd