This reverts commit 199ce5d953ed90e052a69f520b30b7253b163250.

If UE receives retransmission for already decoded PDSCH, it skips decoding and sets ACK directly.
And adding PDSCH decoding stats and printing then every 64 frames for CI purpose

The BG was set to its default for rounds > 0. This is now fixed by adding it to harq structure.
Also a fix for wrong I_lbrm set in dlsch decoding.

- fixed channel compensation by choosing most recent DMRS symbol ina
  slot
- Removed code to find nearest DMRS symbol for channle compensation
- Updated TBS calculation in DLSIM
- Added debug prints in PTRS CPE estimation for DMRS symbol

- -U 2 0 [0-2], can be used to update DMRS configurations
- update check for additional position 3 in dlsch decoding

removed AssertFatal in nr_ue_mac_procedures.c for nr_dlsim HARQ tests. For some unknown reason there are occasion 0 SDUs sent up to MAC which causes failure.

Also fixed bugs in ulsim and dlsim harq tests

- DM-RS type {1,2} was wrongly assigned to {1,2} instead of {0,1}
- Num DM-RS CDM groups without data is now taken into account in mthread
  decoding function
- number of DM-RS CDM groups without data for format 1_0 according to 5.1.6.2
  3GPP TS 38.214 version 15.9.0 Release 15:
-- the UE shall assume the number of DM-RS CDM groups without data is:
-- 1 (CDM group 0) for the case of PDSCH with allocation duration of 2 symb
-- 2 (CDM group {0,1}) for all other cases.

- ceiling computation num of segments (cod/dec)
- fixes demodulation
- initialisation CW for PDSCH RA
- memcpy dl_ch_estimates to pdsch_vars_ra (hotfix)
- correct N_RB for DCI 1_0 and RNTI_RA

decoding performance degraded. still some issue to be solved.