BBOI-464 bigbang network ingress diagram

Summary Moving 2nd Arch Diagram from this spot in IL2 Confluence to public repo
https://confluence.il2.dso.mil/display/BB1/BigBang+UHC+Generic+Architecture+Diagram

Click Here to see Doc to Review:
https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/BBOI-464_Network_Flow_Diagram/docs/understanding/bigbang_network_ingress_diagram.md