Integration: `2024.w26` (part 2)

See merge request oai/openairinterface5g!2823

* !2794 Power control changes
* !2816 Fix test asan errors
* !2820 fix(T): some missing dependencies on T
* !2714 FAPI P5 Refactoring and unitary test creation
* !2819 Prevent unnecessary assertions for invalid DCI at NR UE
* !2825 Do not extract CSI report if PUCCH format 2 CRC check fails in polar decoder
* !2805 GUAMI decoding and storing in RRC UE context fixed

Merge remote-tracking branch 'origin/NR_UE_prevent_unnecessary_assertions' into integration_2024_w26b

This fix prevents the scheduler to process a wrong CSI feedback message, for example, it avoids the scheduler to compute a wrong MCS from CQI or a wrong RI from CQI

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

Integration: `2024.w26`

See merge request oai/openairinterface5g!2815

* !2750 Add Ubuntu 24.04 to/retire Ubuntu 18.04 from supported distributions, use Ubuntu 22 for CI container images
* !2793 Option '-O' in phy simulators to provide a configuration file
* !2797 Increase TX_DATA.request TB buffer size, fix compute_PDU_Length
* !2814 Update documentation and FEATURE SET
* !2720 Remove thread-pool Makefile
* remove extra log

This reverts a change in commit
ccba7c87. There is no real reason to
show this warning (the gNB will work just fine, simply not schedule
since no free HARQ) and it makes users unsure.

Extract thread-pool into a separate CMake library.
Extract utils into a separate CMake library.

- come straight to point: how to clone (don't talk about git config)
- refer to contributing documentation where necessary instead of
  repeating information

- CellGroupConfig is handled through DU (hence MAC)
- mention number of DUs/CU-UPs handled per CU-CP
- mention number of UEs handled
- take out BWPs, as we don't support it properly
- typos

Fixed delta MPR.
Fixed an error in PUCCH PC_MAX calculation.

Update instructions and CI for cross-compilation on Ubuntu 22.
Note that for the dockerfile, we use egrep -L which has changed and does
not exit with code 0 on no match. Instead, use -vqz to invert return
code (0 if nothing found, otherwise 1).

iperf2 2.0.13, used in Ubuntu 20, does not need a "back channel"; we can
therefore use it in feMBMS (which does a broadcast, without back
channel). Ubuntu 22 comes with 2.1.5, which seems to require a back
channel, or at least, we cannot use it reliably in feMBMS. Hence,
downgrade to older iperf2 version.
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

This updates all images in the CI to Ubuntu 22. It also updates
corresponding documentation. Remove python(2) from the image, as it is
not needed. Update documentation.

It seems that the gcc coming in Ubuntu 22 does not like
stack-protector-strong, so remove it as well.

Since we compile Flexric, which does not support Ubuntu 22's default
gcc-11 (it hits a compile bug), switch to gcc-12 manually.

Since we update the compiler, we also need to be careful to use the right
address sanitizer version (which is bundled with the compiler version).
To avoid a reinstallation of the wrong asan version in target images, we
modify Ubuntu 22 targets to copy libasan from the base image. This is necessary
since we use update-alternative in the base image, but we don't want to
install compilers in the target images to use update-alternatives to
install the right asan version... This should be undone when switching
to Ubuntu 24 in the future, as it will have a newer default gcc version,
such that we don't need to update the compile in the first place.

Upgrade libpython in lteUE for U22 upgrade to make it compatible with
UHD.

A number of warnings appear when compiling flexric with gcc-12, which we
use in the next commit. Those have been fixed upstream. Switch to the
updated version to avoid warnings.