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

#KT-11807 Fixed

idea/testData/codeInsight/overrideImplement/delegatedMembers.kt.after

@@ -5,7 +5,7 @@ interface T {
 
 class C(t :T) : T by t {
     override fun bar() {
-        <selection><caret>throw UnsupportedOperationException()</selection>
+        <selection><caret>throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.</selection>
     }
 
     override fun equals(other: Any?): Boolean {
@@ -13,7 +13,7 @@ class C(t :T) : T by t {
     }
 
     override fun foo() {
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 
     override fun hashCode(): Int {