Extend range of "use expression body" to left brace..end of return

Range is extended iff we are in DO_NOT_SHOW case,
otherwise just return is highlighted to avoid ugly highlighting
So #KT-19771 Fixed

idea/testData/inspectionsLocal/useExpressionBody/leftBrace.kt

@@ -0,0 +1,7 @@
+// HIGHLIGHT: INFORMATION
+// PROBLEM: Use expression body instead of return
+
+fun simple(): Int {<caret>
+    return 1 *
+           (2 + 3)
+}

idea/testData/inspectionsLocal/useExpressionBody/leftBrace.kt.after

@@ -0,0 +1,5 @@
+// HIGHLIGHT: INFORMATION
+// PROBLEM: Use expression body instead of return
+
+fun simple(): Int = 1 *
+       (2 + 3)