Handle abusive search parameters

What does this MR do and why?

We currently get all sorts of nasty parameters that appear to have malicious intent. These types of abusive search parameters cause errors.

This was discovered by looking through exceptions on Global Search here.

If parameters like these are detected, the SearchController will give an OK response but won't do any real work. Also, this will log these types of events so we can have faster response times to block potentially abusive users that do these types of searches.

Screenshots or screen recordings

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How to set up and validate locally

Run test suite on search_controller_spec.rb

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.