Use same optimization from relevantSources query

Author: jesusfcr

Diff for: pkg/store/sources.go

@@ -237,13 +237,14 @@ func (db *psqlxStore) relatedFamilies(sf SourceFamily) (SourceFamilies, error) {
 	SELECT DISTINCT s.name, s.component, s.target_id
 	FROM sources s
 	WHERE s.target_id = $3 AND s.component IN (
-		SELECT s.component
-		FROM sources s INNER JOIN source_issues si ON si.source_id = s.id
-		WHERE s.target_id = $3 AND si.issue_id IN (
-			SELECT si.issue_id FROM source_issues si
-			INNER JOIN sources s ON si.source_id = s.id
-			WHERE name=$1 AND component=$2  AND target_id = $3
-		)
+		SELECT UNNEST(comps)
+		FROM (
+			SELECT DISTINCT ARRAY_AGG(DISTINCT s.component) comps
+			FROM sources s INNER JOIN source_issues si ON si.source_id = s.id
+			WHERE s.target_id = $3 AND s.name=$1
+			GROUP BY issue_id
+			HAVING $2 = ANY(ARRAY_AGG(DISTINCT s.component))
+		) C
 	)`
 
 	args := []interface{}{sf.Name, sf.Component, sf.Target}