integration_2021_wk48_d

MR !1308 (merged) : Nr add ue improvements
MR !1310 (merged) : parallelization of LDPC decoding on UE side
MR !1331 (merged) : T tracer: trace MAC DL retransmission PDUs in the gnb
MR !1306 (merged) : fix for harq value in fapi indication according to scf
CI fixes : cherry pick