Integration Branch : 2024 Week 36

See merge request oai/openairinterface5g!2956

Flags are set to INVALID when it is not a UL slot. This is important
when using GPIO to control TRX switch.

./run_tests.sh was not functional anymore because of the introduction
of AssertFatal() in nr_rlc_entity.c

Including the .h and providing exit_function() solves the problem.

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

Co-authored-by: Luis Pereira <lpereira@allbesmart.pt>

Co-authored-by: Luis Pereira <lpereira@allbesmart.pt>

The F1AP UE context release procedure can happen in at least two cases:

1. core requested a release of a UE
2. CU requests DU a release of a UE without a core release (e.g.,
   handover)

In case 1., the CU has to fully release the UE in the CU, then ack the
NGAP message from the core, whilst in 2., nothing of that should happen
after the DU acknowledges the F1AP UE context release cmd.

In some cases, we don't have the ue_data that is used until this commit.
Make this macro more general by only requiring the assoc_id to check.

cuup_notify_reestablishment() used
  &ue_p->established_drbs[drb_id]
to look up a bearer, which is wrong, because it should be drb_id - 1
as in the top of the loop. Also, it used the dedicated get_drb()
function; harmonize to use only this function.

Refactor this to allow the reuse of this function for handover later.