Add parameters: MCS, Bandwidth (in PRBs), slot scheduling bitmap

To shorten pf_ul() and make it more readable, we put the functionality
of retransmittiong to a UE into a separate function. Thus, it might be
re-used in other scheduling scheme functions (e.g., RR instead of PF).

In order to determine the number of RBs, the pre-processor needs to
calculate the TB size (as it depends on how much of data the UE actually
has to send). Before, the pre-processor would calculate this again,
which obviously is superfluous.

Note: in the DL, we do the same

nr_process_mac_pdu() gets the UE_id instead of the RNTI as parameter to
avoid to search the UE_id after nr_rx_sdu() did that already.

Since nr_process_mac_pdu() is only used/called from one file, remove
from the header file.

Reformat affected code to align more closely with OAI style guidelines.

Due to real-time issue, we might miss HARQ feedbacks. Similarly, I
observed that we get feedback for HARQ processes scheduled for a future
frame (don't know how this can happen).

This commit introduces a function that checks whether the first HARQ
process in the queue corresponds due the current frame/slot combination.
If not, it marks old feedbacks for retransmission.  Furthermore, it also
checks whether the feedback is too early, by not considering this
feedback.

MR !1071 : rohan_ulsim2RxFix
-Support added for 2RX antennas case in ulsim
-fixed indexing issue in gNB RX chain 

MR !1086 : fix-nr-pdcp-timer
-The discard timer (set to infinity) is used by the PDCP layer to discard packets that were not transmitted to RLC after some time.

MR !995 : NR_MAC_TCI_UCI_GlobalEdge
TCI:
-Activation of PDSCH TCI states, Activation of PDCCH TCI state
-Construction of the codepoint, Updating nFAPI DCI1_1 (tci_field)
-SSB Beam switching on basis of CSI MeasReport(SSB RSRP) 
-Added get_measured_rsrp and get_diff_rsrp API’s to get SSB RSRP’s. 
UCI:
-Bit length calculation for the scheduled UCI Reporting for CSI-RS and SSB 
-Extraction of received CSI Report (L1-RSRP) when according to the calculated bit lengths and processing it.

MR !1082 : NR_10MHz
-Support of 10MHz BW for 5G NR

MR !1013 : ptrs_rrc_config
-Remove hardcoding of DL and UL PTRS parameters at gNB and NR UE

add new nsa reference test

dummy files cleanup