At this point we can see the UDP uplink data
getting to the GTP layer of the gNB. This
only works if you change the memcpy in serialize_sdu()
to not have the encoded.byte

Also, lots of debugging logs added

In the PDCP layer, if the sdu size < 3, this
just means control information is being passed.
In this case, we do not want to cipher the sdu,
its better to just return.
]

Also, finally committing the critical logs for IP traffic.

The IP traffic still does not work. But we are
updating the NR UE scheduler to ensure we are are
sending true IP traffic. Also, we were getting an
assert(); as well, and there was no logs, so we
fix that in this commit as well.

Regarding dl_hard, some AssertFatal commented out.
Regarding to memory allocation error, AssertFatal was used.

Also changed logic in the NR UE schedule to read
IP traffic. Also, configured the RLC layer in the
NR UE softmodem and the DRBs with the cRNTI once
the RACH procedure is complete in the NR UE.

Updated the configuration files. Added a sleep to
ensure that the LTE UE gets attached to the EPC
before the bearer is modified to be gNB. Updated
the ifconfig tunnel up command to be brought up
by the NR UE socket when in NSA mode. Lastly,
started the gNB PDCP layer in S1 mode.

Restored original LOG level.
Code cleanup to remove emptry space and added some logs.

1. If VNF is slower than PNF, next scheduling will be done after resync.
2. If VNF is unstable in slot progress, next scheduling will be done in next stable status.
3. SFN/SLOT indications are queued in nrUE.
4. get_queue is used instead of unquque for FIFO operation.

Unnecessary dl_ind_type array for logging.

Separate nfapi.conf files for proxy

See merge request aburger/openairinterface5g!47

In scripts/conf_files, restore ue.nfapi.conf and nr-ue.nfapi.conf
to the template versions.  And add proxy_ue.nfapi.conf
proxy_nr-ue.nfapi.conf for use with emane.git's run-oai and
multi-ue-proxy.git's run-oai.

Once the LTE UE's tunnel interface with the EPC
is ready to be established, if we are in NSA mode,
we do not want to launch the tunnel interface
from the LTE UE side, but in the NR UE. Via itti_msgs
we send the string containing the tunnel interface
'up' command to the NR UE and bring it up from the NR UE.

Also, updated the filing of the DCI payload
based on the actual number of recevied bits
and not based on the max number of rx'd bits.

This commit includes several changes.
First, it updates the way we fill the uplink
UCI indication. This still has some todo comments
since all the fields in this ind were hardcoded.
It also updates the pack and unpack functions for
the NR_UCI incations. Lastly, it includes updates
to the gNB UCI scheduler. The updates in the gNB
were cherry picked from develop. There are two updates
to the VNF which allow the VNF timing/slots to be
adjusted based on the received timing_info packets
from the VNF. This adjustment was disabled in IISc's
nFAPI code. For now, it is improving the timing
between the VNF and PNF.

Currently, the pull8 in nFAPI of the VNF
is failing.

The previous two commits did not correctly check
the gNB sfn and slot. The code now correctly sets
the slot in which the PUSCH is SCHEDULED, not the slot
the rx is expected. Also, the sfn/slot is only updated
if we do in fact schedule a PUSCH.

Also, we are now updating ul_tti_future
for every index in the array, not just slot 7, 8, and 9.

Although the timing isnt perfect, if the VNF adjusts
in the middle of scheduling a DCI the gNB would try to
send two DCIs for a certain sfn/slot; this commit will
stop that from happening. The timing issue still persits.

Sync more NFAPI changes from multi-ue-proxy.git

See merge request aburger/openairinterface5g!45

Sync nfapi_p[57].c with multi-ue-proxy.git

See merge request aburger/openairinterface5g!44

Also, added functionality to fill tx_req in NR UE
when a DCI is received after the slot indication.

Most notably, nfapi_rx_indication_pdu_t.data type is changed from
`uint8_t*` to `uint8_t[]`.  Also, renamed from `data` to
`rx_ind_data` to make it easier to find.

These are all superficial, low-risk changes