feat: show max tag count in select filter (#14486)

Co-authored-by: einatnielsen <einat.bertenthal@nielsen.com>

superset-frontend/src/filters/components/Select/SelectFilterPlugin.tsx

@@ -227,6 +227,7 @@ export default function PluginFilterSelect(props: PluginFilterSelectProps) {
         onChange={handleChange}
         ref={inputRef}
         loading={isRefreshing}
+        maxTagCount={5}
       >
         {data.map(row => {
           const [value] = groupby.map(col => row[col]);