adding a function to check the received RRC configuration (function to be expanded in later commits)

also move functions to check RRC configuration to a new file not to overload the already big rrc_UE.c

CMakeLists.txt

@@ -1201,6 +1201,7 @@ set(NR_L2_SRC_UE
   ${NR_UE_RRC_DIR}/L2_interface_ue.c
   ${NR_UE_RRC_DIR}/main_ue.c
   ${NR_UE_RRC_DIR}/rrc_UE.c
+  ${NR_UE_RRC_DIR}/verify_RRC.c
   ${NR_UE_RRC_DIR}/rrc_timers_and_constants.c
   ${NR_UE_RRC_DIR}/rrc_sl_preconfig.c
   )