compiles, still needs to be tested gNB alone with rf-simulator / RF bench.

Still need to update PDCCH configuration with NR FAPI specifications

nr-ip-over-LTE: Modification to support both use cases: DLSCH phy-test scheduling (random data generation in every opportunity) AND DLSCH scheduling only when there is IP traffic arriving through the LTE stack (noS1 mode)

- reworked configuration file and configuration for gNB (write directly to ASN1 structure from config module instead of passing intermediate structures)
- added prach procedures for gNB with configuration of PRACH L1/L2 parameters

- UE channel estimation no longer done in slot_fep. Also created dedicated memory for channel estimates of different channels
- using nr_extract_dci_info instead of nr_generate_ue_ul_dlsch_params_from_dci as in phy_procedures_nr_ue. The latter was only a (poor) wrapper and not doing what the name suggests. also with FAPI things have to be done differently now. This will come in a next commit.
- other minor changes to remove warning
prepreatory changes

changed name of function initial pdcch scheduling parameters. Currently we set the BWP information to be the full bandwidth of the NR cell. This should be changed to include the CellGroupConfigCommon initial BWP information either from SIB or from LTE RRC.

DCI still not updated to start from MSB. Will be in next commit

BWP information in NFAPI gNB/UE
dci encoding / decoding integrated
DCI decoding still fails