Override/Implement: Use function body template when generating functions with default body

#KT-11807 Fixed

idea/idea-completion/testData/handlers/basic/override/ImplementFunction.kt.after

@@ -4,7 +4,7 @@ interface I {
 
 class A : I {
     override fun foo(p: Int) {
-        <caret><selection>throw UnsupportedOperationException()</selection>
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 }