feat(java/ui) Add search suggestions to our search experience

[chriscollins3456]

This PR implements requesting for search suggestions on the new virtual _entityName field which is on all of our searchable entities. Right now it's configured by default with everything so it only returns suggestions if there are no results that come back. This can be fine-tuned.

We only actually ask for suggestions though if we pass a new search flag in asking for suggestions. I'm only doing this on our main search page on the frontend.

Caveat: Elasticsearch term suggesters does not take into account filters so it always gives suggestions based on no filters applied. This seems like a real gap for elastic right now and was not something Indy or myself could figure out how to get them to be applied.

We are now returning an optional list of suggestions on searchAcrossEntities which I expect to be used in the UI but not from anyone using our API.

On the frontend, if there are search results and suggestions, render the suggestion on the top left sayng "Did you mean {suggestion}" and clicking it routed them to search for that new query with all filters cleared.

If there are no search results, the design of what we say has changed to suggest clearing filters / selected view and show any suggested text if it exists. If there is no suggested text and no filters/view then we show the old "Explore all" button.

Screenshots:

Checklist

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[joshuaeilers]

lgtm just need to fix the merge conflict