Synchronized is no more allowed on abstract functions

compiler/testData/diagnostics/testsWithStdLib/annotations/Synchronized.kt

@@ -0,0 +1,23 @@
+import kotlin.jvm.Synchronized
+
+interface My {
+    <!SYNCHRONIZED_ON_ABSTRACT!>@Synchronized<!> fun foo()
+
+    @Synchronized fun bar() = 1
+
+    @Synchronized fun baz(): String {
+        return "abc"
+    }
+}
+
+abstract class Your {
+    <!SYNCHRONIZED_ON_ABSTRACT!>@Synchronized<!> abstract fun foo()
+
+    @Synchronized fun bar() = 1
+
+    @Synchronized open fun baz(): String {
+        return "xyz"
+    }
+}
+
+@Synchronized fun gav() = 1