Improvements to decode SIB1 in 3rd party implementations and OAI UE with the same gNB configurations

implementation of missing symbol-based rotation for NR modulation/demodulation (Section 5.3 38.211). Tested with unitary simulators (ulsim/dlsim).
To be tested with gNB testbench and rfsimlator

Also fixed bugs in ulsim and dlsim harq tests

- this was necessary because as soon as the gNB starts, it tries detecting
  the prach preambles and it mesaures the background noise. However, there is
  a delay of several dozens of frames before it considers the preables as
  detected.
- the solution at the UE consists in avoiding sending preamble as soon as the
  UE syncs by introducing an offset, this keeps the power measurements low at
  gNB side as long as the preamble detection counter is under threshold

- now the FAPI interface copies the struct directly to NR_UE_PRACH
- NR_PRACH_CONFIG_COMMON and NR_PRACH_CONFIG_INFO have been removed from FP

- using NR RACH config common from scc
- fixed return type RA preamble target power functions
- retrieving PRACH format from PRACH resources

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

gNB runs fine. UE yet to be tested.

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.

- Problem was related to UE_id and G

- Added nr_dft at UE side and nr_idft at gNB side
- NR_SC_FDMA can be found in "PHY/defs_nr_common.h"
- For 1 SNR loop, the code executes correctly
- For more loops, it gives a segmentation fault in the LDPC decoder
- The segmentation fault is caused when nr_idft is used
- The code works fine when the "NR_SC_FDMA" is disabled

- 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

initial prach implementation. Splitting of components for RU (FFTs) and L1 (detection). Update of UE to include all formats (for 30 kHz SCS case on initial BWP)

Final --phy_simulators warning removals for this branch, and former polar coding function corrections