BBOI-435 Moving doc from IL2 Confluence to repo

Summary
Moving 3rd 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-435_data_flow_diagram/docs/understanding/logs_and_metrics_data_flow_diagram.md