Avoid hardcoding SRB2 id in F1 UE context setup request message and extract from RRC itti message instead

Merge branch 'NR_F1C_F1U_extensions' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_F1C_F1U_extensions

Change name for common itti message structure used for handling F1 UE context setup request and response messages

MR !1252 : Bugfix nr rlc w36
Fix a bug about segmentation present in both NR RLC AM and NR RLC UM.

MR !1253 : minor: T tracer: be more verbose for DLSCH DCI

MR !1254 : fix for pointa computation in sib1
Fix computation of pointA in SIB1

MR !1217 : fix-physim-run-script-on-cluster
oai-nr-dlsim may seem fine but in fact, test21 may or may not be executed. 
On some run example, we do not have finished message on nr-dlsim pod.

MR !1255 : Attempt to fix nr-dlsim Test 21 (4x4 MIMO, 2 Layers)

Merge branch 'NR_F1C_F1U_extensions' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_F1C_F1U_extensions

Merge branch 'NR_F1C_F1U_extensions' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_F1C_F1U_extensions

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

-Fix contents of F1AP UE context setup response message

Merge branch 'NR_F1C_F1U_extensions' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_F1C_F1U_extensions

Add rrc handling for F1 UE context setup response message at the CU and gtp-u tunnel update functionality

-Remains to be tested