Show what tags a given sidecar has configured in its sidecar.yml

## What?

Allow the Graylog UI to communicate which tags a given sidecar has configured in its sidecar.yml

## Why?

As far as I can find, theres no way to know what tags are configured in a given sidecar's `sidecar.yml` (other than querying mongo). This is VERY useful to verify the configured tags are correctly reporting to graylog.

It would also be helpful to be able to search, sort, and filter based on tags.

Now that I think about it, it actually makes the most sense that tags can also be set via the Graylog web interface as well as the `sidecar.yml` config file.

## Your Environment

* Graylog Version: 5.0.1
* Elasticsearch Version: OpenSearch 2.4.1
* MongoDB Version: 5.0.14
* Operating System: Ubuntu Server 20.04 LTS
* Browser version: 108.0.5359.124