- now the function gets more input arguments but can be used from both UE and gNB
- this change was needed because the prach fapi of UE differs from the gNB one

As adding PTRS leads to shortening of the coded data, redudandency is removed and the performance decreases on a pure AWGN channel.
So PTRS should only be enabled if phase noise is present.

added longer prefix in PRACH symbol zero period for 15/30 kHz SCS. Both gNB and UE processing is modified. prachsim is functional again with new FAPI interfaces.

added scheduling of PRACH RX procedures in gNB and RU entities. Initialization of prach sequences added to nr_init.c

- Updated PRACH procedures and general code formatting
- gNB msg1 handling and RAR generation
- general bug fixing
- formatting
- missing headers
- RAR handling.

Testing of NR PDCCH/PDSCH with RRC Configuration. added RRC configuration to NR UE. Updates to UE DCI procedures (moved to MAC) and updates to FAPI interfaces for UE. nr_dlsim is functional, added profiling information for gNB TX.