Create From Usage: Fix template insertion when target container is not empty

idea/testData/quickfix/createFromUsage/createFunction/call/afterFunOnUserTypeWithDeclarations.kt

@@ -0,0 +1,14 @@
+// "Create function 'foo' from usage" "true"
+class F {
+    fun bar() {
+
+    }
+
+    fun foo(i: Int, s: String): Int {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}
+
+class X {
+    val f: Int = F().foo(1, "2")
+}

idea/testData/quickfix/createFromUsage/createFunction/call/beforeFunOnUserTypeWithDeclarations.kt

@@ -0,0 +1,10 @@
+// "Create function 'foo' from usage" "true"
+class F {
+    fun bar() {
+
+    }
+}
+
+class X {
+    val f: Int = F().<caret>foo(1, "2")
+}