Some problems when we release the device:

    - Calling the destructors is wrong, we should set the pointers to NULL.
      These are shared pointers, this is C++.
    - We have to stop rx by doing a STREAM_MODE_STOP_CONTINUOUS.
    - The end-of-burst for tx has been simplified.

This problem when we acquire the device:

    - Calling get_rx_stream() many times seems to be problematic.

We now should have a better behavior with UHD 4.2 and N310. (Hopefully with
others too.) No crash seen so far.

Many useless dependencies have been removed or moved to the additional tools list of packages.
Xforms and ue-ip module must now be built explicitly
Removed support for Ubuntu 16. Addedd support for Debian 11 and Fedora 37

Squashed commits:

removed all unused dependencies
Applied patch from Robert + cleanup in the dependencies
Applied patch from Robert + cleanup in the dependencies
Moved xforms to optional packages, minor fixes
remvoed ue_ip module from ue build
fixes in the build script
styling fixes
Make RHEL8 ran-base build
- Use EPEL 8
- Inside container there is no sudo, so remove superfluous -H
- Install python3-mako
Working build on fedora 36
Make build by install xxd
Drop Ubuntu 16 support
add pip3 again
Correct software
Drop useless software, maybe drop python too
Fix: comment mistaken for package
Remove Netinterfaces from optional packages (Ubuntu)
Don't link xforms into 4G simulators: not needed
Install xmlstarlet, required for physims
Support for fedora 37
Remove irrelevant svn executable from physims
Option to compile UE ip kernel module
Install only relevant boost libs
Removed --skip-broken
Remove unnecessary vconfig,numpy,scipy dependencies
Remove packages that have been installed (pkg-config), python, awk
Remove unnecessary ntpsec package
addedd support for debian 11
styiling fixes

integration_2023_w05

See merge request oai/openairinterface5g!1936

* !1897 NR improvements for scheduling with DCI 1_0
* !1899 Fix buffer overflow and memory alignment at the UE
* !1916 Remove legacy 4G RLC
* !1920 bugfix: fix sdap
* !1923 fix(ci): fixes to run on caracal after RHEL9 migration
* !1931 set max UEs to be scheduled by MAC
* !1573 FAPI: correct port numbers, clean up some comments
* !1765 Improve USRP GPIO handling
* !1868 Change the nFAPI command line parameter of nr-softmodem (--nfapi) to expect string values instead of integer values
* !1930 improving MIMO section on runmodem file
* !1934 Make rftest compile

Merge remote-tracking branch 'origin/NR_improvements_for_scheduling_with_DCI_1_0' into integration_2022_wk05

- previously, used magic numbers to designate nFAPI mode
- now, use string values (MONOLITHIC, PNF, VNF, ...)
- Remove printing of the nfapi mode to the console, as it's value is clear from the command-line argument
- Update usages of the --nfapi command-line parameter in scripts and documentation to reflect the change to string values

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

There was a problem testing accelleran cu + oai du + oai ue + rfsim
because accelleran cu configures sdap header for UL but not for DL
and our sdap implementation deals with either "no sdap header at all"
or "sdap headers for both UL and DL".

The code has been modified to deal with the other cases
("sdap header for UL but not DL" and "sdap header for DL but not UL").

has_sdapDLheader and has_sdapULheader have been removed, has_sdap
too, replaced by has_sdap_rx and has_sdap_tx, which makes the code
independant of ue or gnb and is, I think, clearer.

With this work, accelleran cu + oai du + oai ue + rfsim works. We
also have oai gnb + oai ue + rfsim functional for all cases of sdap
header configuration (this won't happen for users, the code of gnb has to
be modified to have sdap header for only ul or only dl). It also works
with a COTS UE for all cases of sdap configuration (again, this won't
happen for users, only "no sdap header" and "sdap headers for both
UL and DL" exist in oai gnb with the current code).

To have other cases, you can edit openair2/RRC/NR/rrc_gNB_radio_bearers.c
and search for NR_SDAP_Config__sdap_HeaderDL_present in there.

To enable sdap, run the gnb with the command line argument
--gNBs.[0].enable_sdap 1