Improvement in nr_get_csi_rs_signal() and nr_csi_rs_channel_estimation() to later be easier to extend to multiple ports

Deletes the second_addr parameter in all files that also use the
mgmt_addr=192.168.18.240 (asterix's N310).

# Conflicts:
#	openair1/SIMULATION/NR_PHY/dlsim.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
#	openair2/RRC/NR/MESSAGES/asn1_msg.c
#	openair2/RRC/NR/MESSAGES/asn1_msg.h
#	openair2/RRC/NR/nr_rrc_config.c
#	openair2/RRC/NR/nr_rrc_config.h
#	openair2/RRC/NR/rrc_gNB.c
#	openair2/RRC/NR/rrc_gNB_nsa.c

Integration 2022 wk09 b

See merge request oai/openairinterface5g!1483

# Conflicts:
#	openair1/PHY/NR_TRANSPORT/nr_sch_dmrs.c
#	openair1/SCHED_NR_UE/fapi_nr_ue_l1.c
#	openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

Integration 2022 wk09

See merge request oai/openairinterface5g!1477