Introduce UNUSED_ANONYMOUS_PARAMETER for anonymous functions

It is not reported for 1.0 language version because
renaming to _ is not possible. It has weak warning severity

So #KT-8813 Fixed
So #KT-16875 Fixed

compiler/testData/diagnostics/tests/annotations/onFunctionParameter.kt

@@ -4,4 +4,4 @@ fun test(@ann <!UNUSED_PARAMETER!>p<!>: Int) {
 
 }
 
-val bar = fun(@ann <!UNUSED_PARAMETER!>g<!>: Int) {}
+val bar = fun(@ann <!UNUSED_ANONYMOUS_PARAMETER!>g<!>: Int) {}