Remove the new UL_INFO local variable in the VNF.

This struct is used to store the uplink 5G nFAPI messages between the proxy and the gNB MAC layer. The original OAI implementation utilizes a similarly named variable (UL_info) to store the uplink 5G nFAPI messages between the PHY and MAC layer. This commit will utilize the original UL_info variable prior to calling the handle functions. These changes allow us to make minimal changes to the nFAPI handle functions and modifies the NR_UL_Indication parent function instead.