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/functionAsExpression/AutoLabels.kt

@@ -1,4 +1,4 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
 
 fun <T, R> Iterable<T>.map(transform: (T) -> R): List<R> = null!!
 

compiler/testData/diagnostics/tests/functionAsExpression/FunctionType.kt

@@ -1,5 +1,5 @@
 // !CHECK_TYPE
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !DIAGNOSTICS: -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
 
 fun testReturnType(foo: String) {
     val bar = fun () = foo

compiler/testData/diagnostics/tests/functionAsExpression/InferenceParametersTypes.kt

@@ -1,5 +1,5 @@
 // !CHECK_TYPE
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
 fun <T> listOf(): List<T> = null!!
 
 fun test(a: (Int) -> Int) {

compiler/testData/diagnostics/tests/functionAsExpression/MissingParameterTypes.kt

@@ -1,5 +1,5 @@
 // !CHECK_TYPE
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
 
 val a = fun (<!CANNOT_INFER_PARAMETER_TYPE!>x<!>) = <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>x<!>
 

compiler/testData/diagnostics/tests/functionAsExpression/Parameters.kt

@@ -1,4 +1,4 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
 
 val bar = fun(p: Int = <!ANONYMOUS_FUNCTION_PARAMETER_WITH_DEFAULT_VALUE!>3<!>) {}
 val bas = fun(<!USELESS_VARARG_ON_PARAMETER!>vararg p: Int<!>) {}

compiler/testData/diagnostics/tests/functionAsExpression/WithGenericParameters.kt

@@ -1,4 +1,4 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_ANONYMOUS_PARAMETER
 
 interface A
 fun devNull(a: Any?){}