ENDC path switch S1-U: Enable GTP task and relevant GTP-U configuration at the gNB for the S1-U plane with the SGW

ENDC path switch S1-U: Add proper E-RAB configuration for corresponding X2AP and S1AP messages and call function to create GTP S1-U tunnel at gNB

ENDC path switch S1-U: Preliminary work to generate S1AP E-RAB-Modification-Indication message that triggers the path switch procedure at the core network

Seems like the UEs in the CI don't like when asked to report NR UE
capabilities. So let's first ask for eutra capabilities and then
dig into them to check for en-dc support and only then ask for
NR capabilities. We chose to ask for NR capabilities after receiving
RRCConnectionReconfigurationComplete. That may not be the best thing
to do.

Today, we do nothing with those capabilities. We could completely skip
asking them to the UE, but since the code is there and since it may be
useful in the future, let's do it. Hopefully, it should not hurt too much.

Merge branch 'NR_RRCConfiguration' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_RRCConfiguration

fixing test_case_list.xml

Merge branch 'NR_RRCConfiguration' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_RRCConfiguration

Merge branch 'NR_RRCConfiguration' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_RRCConfiguration

fixing beam to boresight for testing

replacing phy_test local variable from nr_dlsim.c and nr_ulsim.c with get_softmodem_params()->phy_test

     align folder structure in README w/ 5G-NR new folders
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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

Merge branch 'NR_RRCConfiguration' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_RRCConfiguration

Initial sync not happening fot FR2

 -- fromdos was to be called from python executor and not from ADB server
 -- doing a power-cycle on CAT-M module at start of test
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>