Allow open callable members in expect interfaces

#KT-42094 fixed

native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/cir/CirFunctionOrProperty.kt

@@ -23,9 +23,6 @@ interface CirFunctionOrProperty :
     val returnType: CirType
     val kind: CallableMemberDescriptor.Kind
 
-    fun isNonAbstractMemberInInterface(): Boolean =
-        modality != Modality.ABSTRACT && containingClassDetails?.kind == ClassKind.INTERFACE
-
     fun isVirtual(): Boolean =
         visibility != DescriptorVisibilities.PRIVATE
                 && modality != Modality.FINAL

native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/AbstractFunctionOrPropertyCommonizer.kt

@@ -29,8 +29,7 @@ abstract class AbstractFunctionOrPropertyCommonizer<T : CirFunctionOrProperty>(
     }
 
     override fun doCommonizeWith(next: T): Boolean =
-        !next.isNonAbstractMemberInInterface() // non-abstract callable members declared in interface can't be commonized
-                && next.kind != DELEGATION // delegated members should not be commonized
+        next.kind != DELEGATION // delegated members should not be commonized
                 && (next.kind != SYNTHESIZED || next.containingClassDetails?.isData != true) // synthesized members of data classes should not be commonized
                 && kind == next.kind
                 && modality.commonizeWith(next.modality)

native/commonizer/testData/callableMemberCommonization/openCallableMemberInInterface/commonized/common/package_root.kt

@@ -0,0 +1,3 @@
+expect interface Interface {
+    open fun openFun()
+}

native/commonizer/testData/callableMemberCommonization/openCallableMemberInInterface/commonized/js/package_root.kt

@@ -0,0 +1,5 @@
+actual interface Interface {
+    actual fun openFun() = Unit
+    fun openFunWithOtherParams(param: Int) = Unit
+    fun openInJs_abstractInJvm() = Unit
+}

native/commonizer/testData/callableMemberCommonization/openCallableMemberInInterface/commonized/jvm/package_root.kt

@@ -0,0 +1,5 @@
+actual interface Interface {
+    actual fun openFun() = Unit
+    fun openFunWithOtherParams(param: Double) = Unit
+    fun openInJs_abstractInJvm()
+}

native/commonizer/testData/callableMemberCommonization/openCallableMemberInInterface/original/js/package_root.kt

@@ -0,0 +1,5 @@
+interface Interface {
+    fun openFun() = Unit
+    fun openFunWithOtherParams(param: Int) = Unit
+    fun openInJs_abstractInJvm() = Unit
+}

native/commonizer/testData/callableMemberCommonization/openCallableMemberInInterface/original/jvm/package_root.kt

@@ -0,0 +1,5 @@
+interface Interface {
+    fun openFun() = Unit
+    fun openFunWithOtherParams(param: Double) = Unit
+    fun openInJs_abstractInJvm()
+}

native/commonizer/tests/org/jetbrains/kotlin/descriptors/commonizer/CallableMemberCommonizationFromSourcesTest.kt

@@ -15,4 +15,6 @@ class CallableMemberCommonizationFromSourcesTest : AbstractCommonizationFromSour
     fun testReturnTypes() = doTestSuccessfulCommonization()
 
     fun testExtensionReceivers() = doTestSuccessfulCommonization()
+
+    fun testOpenCallableMemberInInterface() = doTestSuccessfulCommonization()
 }