Resolve "Visual bug: Compliance report filter area-violation"

What does this MR do and why?

Update visual styling UI in the compliance violation report. See issue for details of change Visual bug: Compliance report filter area-viola... (#406551 - closed)

This change removes border from filter component that caused a double border under tabs

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Before	After

How to set up and validate locally

Navigate to compliance violation report and visually confirm

MR acceptance checklist

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Related to #406551 (closed)