show node monitors on agent page

[mawinter69]

add an advanced button on the agent page. When clicking it will show the node monitors for this agent including any warnings/errors

Testing done

Connect an agent and then visit agent page

Proposed changelog entries

• show monitoring data on agent page

Proposed upgrade guidelines

N/A

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Desired reviewers

@mention

Before the changes are marked as ready-for-merge:

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[NotMyFault]

Looks nice!

[daniel-beck]

Works well and seems useful.

I guess the somewhat odd presentation is necessary because of table cell reuse?

[timja]

/label ready-for-merge

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This PR is now ready for merge, after ~24 hours, we will merge it if there's no negative feedback.

Thanks!