Prohibit synchronized methods on interface members

#KT-9310 Fixed

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

@@ -1,13 +1,17 @@
 import kotlin.jvm.Synchronized
 
 interface My {
-    <!SYNCHRONIZED_ON_ABSTRACT!>@Synchronized<!> fun foo()
+    <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> fun foo()
 
-    @Synchronized fun bar() = 1
+    <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> fun bar() = 1
 
-    @Synchronized fun baz(): String {
+    <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> fun baz(): String {
         return "abc"
     }
+
+    var v: String
+        <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> get() = ""
+        <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> set(<!UNUSED_PARAMETER!>value<!>) {}
 }
 
 abstract class Your {
@@ -18,6 +22,10 @@ abstract class Your {
     @Synchronized open fun baz(): String {
         return "xyz"
     }
+
+    var v: String
+        @Synchronized get() = ""
+        @Synchronized set(<!UNUSED_PARAMETER!>value<!>) {}
 }
 
 @Synchronized fun gav() = 1

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

@@ -3,6 +3,7 @@ package
 @kotlin.jvm.Synchronized public fun gav(): kotlin.Int
 
 public interface My {
+    @get:kotlin.jvm.Synchronized @set:kotlin.jvm.Synchronized public open var v: kotlin.String
     @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
@@ -13,6 +14,7 @@ public interface My {
 
 public abstract class Your {
     public constructor Your()
+    @get:kotlin.jvm.Synchronized @set:kotlin.jvm.Synchronized public final var v: kotlin.String
     @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

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

@@ -0,0 +1,23 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+// !LANGUAGE: +JvmStaticInInterface
+// !JVM_TARGET: 1.8
+
+interface I {
+    companion object {
+        @Synchronized fun syncFun() {}
+
+        <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> @JvmStatic fun syncFunJvmStatic() {}
+
+        var syncProp: String
+            @Synchronized get() = ""
+            @Synchronized set(value) {}
+
+        @JvmStatic var syncPropJvmStatic: String
+            <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> get() = ""
+            <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> set(value) {}
+
+        var syncPropJvmStaticAccessors: String
+            <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> @JvmStatic get() = ""
+            <!SYNCHRONIZED_IN_INTERFACE!>@Synchronized<!> @JvmStatic set(value) {}
+    }
+}

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

@@ -0,0 +1,19 @@
+package
+
+public interface I {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object Companion {
+        private constructor Companion()
+        @get:kotlin.jvm.Synchronized @set:kotlin.jvm.Synchronized public final var syncProp: kotlin.String
+        @kotlin.jvm.JvmStatic @get:kotlin.jvm.Synchronized @set:kotlin.jvm.Synchronized public final var syncPropJvmStatic: kotlin.String
+        @get:kotlin.jvm.Synchronized @get:kotlin.jvm.JvmStatic @set:kotlin.jvm.Synchronized @set:kotlin.jvm.JvmStatic public final var syncPropJvmStaticAccessors: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.jvm.Synchronized public final fun syncFun(): kotlin.Unit
+        @kotlin.jvm.Synchronized @kotlin.jvm.JvmStatic public final fun syncFunJvmStatic(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/annotations/annotationApplicability/annotationsOnUseSiteTargets.kt

@@ -5,7 +5,7 @@ interface Test {
     <!INAPPLICABLE_JVM_NAME!>@get:JvmName("1")<!>
     val b: Int
 
-    <!SYNCHRONIZED_ON_ABSTRACT!>@get:Synchronized<!>
+    <!SYNCHRONIZED_IN_INTERFACE!>@get:Synchronized<!>
     val c: Int
 
     <!OVERLOADS_INTERFACE, WRONG_ANNOTATION_TARGET_WITH_USE_SITE_TARGET!>@get:JvmOverloads<!>