- remove printf in nr_ulsch_coding.c
- renaming test_input to mac_pdu
- using memcpy for mac_pdu instead of pointing to data
- remove temp_nfapi struct from header file

- adding SCHED_NR_UE_LIB to ulsim compilation library
- fixing linking compilation problems
- using fapi_nr_dci_pdu_rel15_t struct to initialize PUSCH
- test_input random data is set in phy_procedures_nrUE_TX instead of ulsim

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

first version of UE FAPI handling for DLSCH. paramters from DCI are now handled by MAC and passed back to the PHY to program PDSCH. Still need to check parameters and take them into account in PHY.

- 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

removing unused code
activating pdsch detection

moving adjust sync out of measurement procedures and making it dependent on successfull decoding of DCI

commenting out call to dl_indication(&ue->dl_indication); as this is not finished and makes UE crash.

reverting some changes in the UE that were introduced by nr_polar_encoder_optimizations to make UE work again on real-time testbench. Now at least the PDCCH can be detected and used for time tracking. However, the DCI is not yet decoded (this will be fixed on branch nr_pdcch_fixes). The reverted changes are most notably passing the correct slot number to slot_fep in phy_procedures_nrUE. This will have to be changed as well in the future when we pass to slot-based processing at the UE.

temporarily disabling PDSCH decoding while finding the problem that makes nr-ue crash when used in real-time