Output actions closer to outputs container

[rebornix]

Extracted from #109549

When trying to delete output, I was always first looking closer to the actual output rather than the cell toolbar.

We discussed before briefly about whether outputs related actions should be rendered in a dedicated toolbar for output (we now already have mime type switcher for output).

[miguelsolorio]

We could try to re-use the same pattern as the cell toolbar but we'd need figure out an alternate location for it as it will cover up the cell language + part of the output:

We could try to at least place inside of the output container as a floating toolbar, this would only appear on hover but could still cover content:

[tanhakabir]

We've decided to put output actions in a menu to the right of output