bugfix in dlsch_encoding for multiple segments. changing TBS for MCS 4, 6 and 28 for 100PRB to be compatible with LDPC

Conflicts:
	openair1/PHY/CODING/ldpc_encoder.c

Conflicts:
	cmake_targets/build_oai
	openair1/PHY/LTE_TRANSPORT/prach.c
	openair1/SCHED/phy_procedures_lte_ue.c
	targets/ARCH/COMMON/common_lib.h
	targets/RT/USER/lte-softmodem.c

removing some prints, changing phy-test mcs=0, disabling parallelization over segments (ldpc has not yet been integrated with that)

Merge branch 'RU-RAU-split-parallel' of https://gitlab.eurecom.fr/oai/openairinterface5g into RU-RAU-split-parallel

added numerology paramter

removed "short_offset" code from normal_prefix_mod. removed static declaration in PHY_ofdm_mod which was a cause for problems when parallelizing FFTs for FEP TX.