Mapping of data REs in DMRS symbol depends only on number of CDM group
no data. So the special case function that depended on delta is removed
and a single function is used.

Use the new struct as function argument instead of individual parameters

There was concern that someone in the future might call the function
with the wrong inputs. So, based on the discussion on the MR below
https://gitlab.eurecom.fr/oai/openairinterface5g/-/merge_requests/2916#note_132506
the SIMD for multiplying DMRS vector with amplitude is removed and is
now done with plain C (no SIMD).

The execution time for the function dmrs_amp_mult() in this commit is
10x higher that the previous commit.

RE mapping time is reduced by 10x. Functions are made generic to be
later reused for PDSCH RE mapping at gNB.

It is better to write to memory that are grouped together to reduce
probability of cache miss. This simple change improved the function's
execution speed by 70%.

Removed the unnecessary memset for the buffer.

Integration: `2024.w35`

Closes #825

See merge request oai/openairinterface5g!2943

* !2181 ULSCH power computation
* !2915 benchmark for rotate_cpx_vector
* !2936 Avoid complete rebuild on cmake run with git info change
* !2855 NR UE replace phy_config_request_sent
* !2937 small fixes for rfsim
* !2925 CI: Increase tested throughput in SA 2x2 pipeline
* !2934 Run optimized parity check in ldpc encoder only on supported Zc values
* !2912 changes for multi-RU support in fhi72
* !2928 Distribution check: check for F40, remove old U/RHEL releases
* !2913 NR gNB cleanup
* !2927 Update Aerial docs to reference current version
* !2940 remove double define with nr_common.h

Merge remote-tracking branch 'origin/NR_UE_MAC_PHY_separation_improvements' into integration_2024_w35

At least in Eurecom, there are no RHEL 7/CentOS 7+8 servers. Existing
installations will work, but we don't want to encourage people to use
these old distributions, so remove it. Also, they reached EOL

Add CentOS stream as an alternative.

In the past, it seemed that we had to add a trailing slash (/) after the
OpenShift Registry URI. Now, at least on the CI machine matix, this
makes it fail:

    INFO: oc whoami -t | docker login -u oaicicd --password-stdin default-route-openshift-image-registry.apps.oai.cs.eurecom.fr/
    INFO: docker pull default-route-openshift-image-registry.apps.oai.cs.eurecom.fr/oaicicd-ran/oai-gnb:develop-46a1d2a6
    WARNING: command "docker pull default-route-openshift-image-registry.apps.oai.cs.eurecom.fr/oaicicd-ran/oai-gnb:develop-46a1d2a6" returned non-zero returncode 1: output:
    Error response from daemon: Head "https://default-route-openshift-image-registry.apps.oai.cs.eurecom.fr/v2/oaicicd-ran/oai-gnb/manifests/develop-46a1d2a6": unauthorized: authentication required

Remove the trailing slash makes it work, like so:

    INFO: oc whoami -t | docker login -u oaicicd --password-stdin default-route-openshift-image-registry.apps.oai.cs.eurecom.fr
    INFO: docker pull default-route-openshift-image-registry.apps.oai.cs.eurecom.fr/oaicicd-ran/oai-gnb:develop-46a1d2a6

The docker pull succeeds.

Some strange behavior may happen if write() to the rfsim socket fails.
Let's print some error, can be useful in case of problem.

It is very possible that the operating system returns a file
descriptor bigger than the size of bridge->buf (MAX_FD_RFSIMU, which
is 250 as of now). As a minimum, let's fail if the socket file
descriptor is out of bounds.

A proper solution may be implemented later, if needed.

Updated links to latest available L1 documentation
Removal of unneeded environment variable in aerial_l1_entrypoint.sh
Removal of unneeded checkout command from doc
Reword Aerial Entrypoint script paragraph to separate in multiple sentences
New UE has been tested with Aerial setup
Change bash blocks to reflect that cuBB container no longer uses root
Add alternative instructions to obtain nvipc sources from container
Add note in Prepare the L1 image section specifying default config file and location

Co-Authored by: Reem Bahsoun <reem.bahsoun@openairinterface.org>

Added 2 testcases for Zc = 64 for ldpc encoder. These testcases check optimized ldpc
implementation against reference.

Optimized ldpc encoder was run for Zc values that are not supported (Zc == 64). This
commit fixes the fallback condition to Zc >= 72 for BG 2

Before this commit, the following will trigger a complete rebuild:

- create another git name (git checkout -b test)
- run cmake again manually (cmake ..)
- run ninja again

The top-level CMakeLists.txt uses add_definitions() to add git
information to all targets; if some git information changes, this will
mark all command lines as dirty, triggering the build.

There is an easy solution: instead of passing this information on the
command line, pass it in a header. This commit uses configure_file() to
generate a file oai_version.h in the build directory with the same
information. Various sources files, e.g., main executables, use this to
output the same information as before. It is then also not necessary to
use header guards, as cmake takes care to create this file.

If cmake is re-run, it will update the header, and trigger only files
including this header will be rebuilt (which can be shown with the above
stpes). The information passed is the same as before, and updates the
information when the old method would have updated it.

This commit introduces google benchmark library and one benchmark for
rotate_cpx_vector.  Also extracted common tools used in testcases for
generation and allocation of byte aligned vectors in phy_test_tools.hpp