Needed for ubuntu 16 and centos 7.

Authors: Bo Zhao, Marwan Hammouda, Thomas Schlichter (Fraunhofer IIS)

- CMakeLists modification: add QtWidgets library, add new source files, MOC (Meta-Object Compiler) on the given source file
- build_oai modification
- Activate new GUI with Qt on the UE side
- 2 x 3 widget with I/Q sample for PDSCH
- Drop-down list implementation

- each image in a new line
- only show up to seconds in date

- remove -R iperf parameter: handled in test by UL/DL direction

- Harmonize code for CNs
- Support TCP
- Different port numbers for multiple UEs
- Calculate UDP throughput for multiple UEs

- Initialize
- Attach
- Detach
- Terminate
- DataEnable
- DataDisable
- CheckStatus

- Remove cls_ci_ueinfra
- Use new UE module in cls_oaicitest
- Remove useless code

new adb script

- allow executing in background
- less logs
- no use of split()
- common implementation of legacy command()

- variables CMAKE_DL_LIBS and LIB_LMS_LIBRARIES are not defined anywhere
- -DPHYSICAL_SIMULATOR is not used anywhere

integration_2023_w08

See merge request oai/openairinterface5g!1967

* !1917 web server optional feature update
* !1938 Reuse old TDA when allocating DL retransmissions
* !1949 Container Images with Ubuntu20 and UHD 4.4
* !1960 Upgrade cmake to 3.12
* !1965 NR Cleanup
* correct IP LTE-2x2
* Add fix physim
* increase 60 Mhz timing threshold
* Add fix F1 ping
* !1939 Remove 4G F1
* !1966 CI test for T1 LDPC offload on caracal
* Fix for Build_eNB not recognizing end of command