CBRA Procedure Working for SA Mode

See merge request aburger/openairinterface5g!81

Got rid of unnecessary mac->scc check as well

The following was changed in this commit:
 - A new struct in the mac instance was created
   for all emulated L1 fields.
 - NR UE RRC state bug was fixed
 - Checking the RAR rnti based on the MAC instance
   ra.ra_rnti and not hardcoding to 0x10b
 - Modified the name of the new emulate_l2 flag
   to make sense: emulate_l1

The DCIs are filtered already in the NRUE when
the NFAPI messages are handled.

Also, changed some if statement formatting.

In SA mode, we will not be able to process the SIB if
we change for mac->scc_SIB == NULL : return;

So we change the statement for NSA mode

It will likely break SA mode because it will
filter out Msg3. I will come back to this and
fix it for Msg3.

Also, reverted a DCI filtering change to exist again.

Need to review this with Raymond.

For multiple UEs, we need to be able to filter the rx'd messages by
the RNTI. However, we do not have the RNTI value until the CFRA (NSA)
or CBRA (SA) procedure is complete. The check below will handle this.
Also, depending on the RNTI value, we can have a SIB (0xffff), RAR (0x10b),
Msg3 (TC_RNTI) or an actual DCI message (CRNTI). When we get Msg3, the
MAC instance of the UE still has a CRNTI = 0. Only once the RA procedure
succeeds is the CRNTI value updated to the TC_RNTI.

1. The preamble index in the NRUE is random for SA.
   Using the preamble index from the mac->ra is
   correct.

2. The dl_pathloss calculated is from L1. We should
   shunt this feature out for our emulated mode. If
   we add the abstraction later, we can model the
   pathloss in the proxy and update it in the RA
   procedure of the NRUE.

3. Checking that the crnti != t_crnti is not valid
   for SA mode. And may only be needed for multi-UE
   in NSA mode. We might be able to delete it all
   together. For now, we only use for NSA mode.

4. Checking the RAR based on rnti = 10b and not the
   RA_STATE is better.

MR !1233 : NR gNB MAC scheduler BWP start issue fix
This branch fix incorrect use of BWP start at gNB MAC scheduler (in DLSCH and ULSCH allocation and VRB map filling)

MR !1232 : SR/BSR support for NR UE
-added the support of scheduling request in NR UE. 
-added the support of regular, periodic and padding BSR in NR UE. 
-removed memcpy call in nr_ue_get_sdu(). 
-called mac_rlc_status_ind only for existing bearers. 
-Moved NR_LONG_BSR_TABLE and NR_SHORT_BSR_TABLE to nr_mac_common.c

MR !1239 : NR SDAP gNB - Transparent Mode

MR !1257 : Nr ldpc cuda softmodem
Move ldpc decoder accelerated in cuda GPU in a shared lib compatible with oai loader. 
libldpc_cuda.so is built as a ldpctest, nr-sotmodem, nr-uesoftmoden and ocp-gnb targets when cuda development environment is detected. 
At runtime --loader.ldcp.shlibversion _cuda option can be used to select the cuda accelerated ldcp library, except for the ldpctest exec where the -G option has been preserved. Also start implementing an opencl version of the ldpc decoder, starting "translating" the cuda version.

MR !1296 : Apply the NSA t_Reordering value also for SA
Apply the NSA t_Reordering value also for SA to improve the iperf downlink bitrate. The same iperf performance is expected at both NSA and SA

MR !1293 : hotfix SEGV and divide by 0
With latest develop, two bugs appear as long as we don't hide them with gcc -O2 optimisations

MR !1259 : gNB nrUE SA: improve security
Improves security and addition security in nrUE side

MR !1260 : NR CSET0 BWP Start fixes
Fixes a bug in selecting the start of BWP for Coreset0

Use Magma MME in CI tests
Update NSA 2x2 test

Merge NFAPI changes to new SA master branch

See merge request aburger/openairinterface5g!79

Instead of resetting queue when full,
take last item out.

Also, in the nr_rrc_mac_config_req_ue(), we should
only be configuring L1 if we are not in the L2 emul
mode. We are crashing due to the RRC state in the NRUE
not being set/checked properly.