os-telegraf: extend elasticsearch output options

[UweW]

Important notices Before you add a new report, we ask you kindly to acknowledge the following:

• [X] I have read the contributing guide lines at https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md
• [X] I have searched the existing issues, open and closed, and I'm convinced that mine is new.
• [X] When the request is meant for an existing plugin, I've added its name to the title.

Is your feature request related to a problem? Please describe. no

Describe the solution you'd like please add the "skip chain & host verification" and the "use_pipeline" option in the elasticsearch output of the telegram plugin option see here https://github.com/influxdata/telegraf/blob/master/plugins/outputs/elasticsearch/README.md

Describe alternatives you've considered no workround available

Additional context Add any other context or screenshots about the feature request here.