KT-12942 related: remove braces now does not work for if inside if

(cherry picked from commit c1faed5)

idea/testData/intentions/removeBraces/ifInsideIf.kt

@@ -0,0 +1,11 @@
+// IS_APPLICABLE: false
+fun test(b: Boolean): String {
+    if (b == true) {
+        if (true) return "first"
+    }<caret>
+    else if (b == false) {
+        if (true) return "second"
+    }
+
+    return "none"
+}