ui: ConsulKind explanatory tooltip panels

[johncowen]

This PR adds 'tooltip panels' to the ConsulKind icon/pill showing explanatory text and links for documentation on each gateway.

Few things to explain here from a code perspective:

1. I went for keeping the text/copy inside the template.
2. I'm using a new from-entries helper here, but I would have rather used ember-composable-helpers version of this. Unfortunately performing an upgrade here gave dependency problems, which would have meant having to upgrade other packages, something I'd rather not do this close to a release. Post release I'd like to switch our from-entries out and use the one provided by ember-composable helpers, following a complete upgrade of all of our packages.
3. Ideally all of this could use popper.js now that we are using something based on that, something for the future.
4. I pulled the info icon work out of the menupanel as it is only being used in the namespace menu right now, I made that specific to the namespace menu only.

• Final links still need adding here.

[johncowen]

@kaxcode I left it at this in the end, a tiny bit better spacing there ^

[kaxcode]