[AzureMonitorDistro] Add LiveMetricsActivityProcessor only when live metrics is enabled#43524

TimothyMothra merged 2 commits intoAzure:mainAzure/azure-sdk-for-net:mainfrom

rajkumar-rangaraj:rajrang/lmCheckrajkumar-rangaraj/azure-sdk-for-net:rajrang/lmCheckCopy head branch name to clipboard