- Add E2 agent that leverages FlexRIC e2ap library
- Add documentation in openair2/E2AP/README.md
- Currently, statistics exported are random

Affected tests:
- 5G RFsim TDD do-ra
- 5g-rfsim-fdd
- 5g-rfsim
- 5grfsim-e1
- 5grfsim-24prb
- 5grfsim-fr2-32prb
- 5grfsim-fdd-phytest
- 5grfsim-u0-25prb
- 5grfsim-2x2
- 5grfsim-f1
- 5grfsim-f1-accelleran
- 4g-l2sim-tdd
- 4g-rfsim-fdd-05mhz
- 4g-rfsim-fdd-05mhz-nos1
- 4g-rfsim-fdd-10mhz
- 4g-rfsim-fdd-20mhz
- 4g-rfsim-tdd-05mhz
- 5g-l2sim

integration_2023_w26

See merge request oai/openairinterface5g!2202

* !2081 Nonlinear ML receiver
* !2188 Bugfix for FR2
* !2189 Bugfix for getting band and numerology from command line for OAI UE
* !2192 Fix bugs in F1 implementation found with UBSan
* !2194 moving handling of RA success for reconfigurationWithSync at RRC
* !2031 Adding new sidelink (SL) variables
* !2148 NR MAC UE further improvements for DCI configuration
* !2164 Enable T304
* !2197 chore(ci-cn): Transition to YAML configuration scheme

Implement the #define variables required for synchronization: These
variables include offset and payload size values that vary from the Uu
interface, in relation to the PSS, SSS and PBCH elements. We also
introduce the new sl_mode command line flag, which is used to switch
between the Uu interface and SL interface. This will allow us to modify
exisitng PSS and SSS functions, without copying complete 5G functions
and only changing a few lines to support sidelink mode.

Fixing formatting for softmodem-common.h

can be used to set a random number generator (RNG) seed uniformly from
command line

- make it clear that it belongs to OAI
- follow convention of uppercase name

- make it clear that it belongs to OAI
- follow convention of uppercase name