Add tests for obsolete issues

#KT-11979 Obsolete
 #KT-12898 Obsolete
 #KT-30657 Obsolete
 #KT-28446 Obsolete

compiler/testData/diagnostics/tests/callableReference/callableReferenceToLocalVariable.kt

@@ -0,0 +1,8 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+
+fun a() {
+    val x = 10
+    foo(::<!UNSUPPORTED!>x<!>)
+}
+
+fun foo(a: Any) {}

compiler/testData/diagnostics/tests/callableReference/callableReferenceToLocalVariable.txt

@@ -0,0 +1,4 @@
+package
+
+public fun a(): kotlin.Unit
+public fun foo(/*0*/ a: kotlin.Any): kotlin.Unit