use terms "lambda expression" and "anonymous function" instead of "function literal" and "function expression"

compiler/testData/diagnostics/tests/regressions/kt402.kt

@@ -1,7 +1,7 @@
 package kt402
 
 fun getTypeChecker() : (Any)->Boolean {
-  <!UNUSED_FUNCTION_LITERAL!>{ a : Any -> a is <!UNRESOLVED_REFERENCE!>T<!> }<!> // reports unsupported
+  <!UNUSED_LAMBDA_EXPRESSION!>{ a : Any -> a is <!UNRESOLVED_REFERENCE!>T<!> }<!> // reports unsupported
 <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
 fun f() : (Any) -> Boolean {
   return { a : Any -> a is String }