Added flags to skip audit/unenroll with fleet

Author: Rohit-code14

docs/en/ingest-management/commands.asciidoc

@@ -1164,6 +1164,9 @@ elastic-agent uninstall [--force] [--help] [global-flags]
 Uninstall {agent} and do not prompt for confirmation. This flag is helpful
 when using automation software or scripted deployments.
 
+`--skip-fleet-audit`::
+Skip notifying / auditing the fleet server.
+
 `--help`::
 Show help for the `uninstall` command.