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

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

@@ -0,0 +1,22 @@
+package
+
+@kotlin.jvm.Synchronized() public fun gav(): kotlin.Int
+
+public interface My {
+    @kotlin.jvm.Synchronized() public open fun bar(): kotlin.Int
+    @kotlin.jvm.Synchronized() public open fun baz(): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    @kotlin.jvm.Synchronized() public abstract fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public abstract class Your {
+    public constructor Your()
+    @kotlin.jvm.Synchronized() public final fun bar(): kotlin.Int
+    @kotlin.jvm.Synchronized() public open fun baz(): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    @kotlin.jvm.Synchronized() public abstract fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}