Allow actuals with more permissive visibility

Allow non-virtual expects to have actuals with more permissive
visibility.

^KT-19664 Fixed

compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.kt

@@ -15,6 +15,7 @@ expect open class Container {
     protected fun protectedFun3()
 
     open internal fun openInternalFun()
+    open fun openPublicFun()
 }
 
 // MODULE: m2-jvm(m1-common)
@@ -24,14 +25,15 @@ expect open class Container {
 actual open class Container {
     actual fun publicFun() {}               // OK: public -> public
 
-    actual fun <!ACTUAL_WITHOUT_EXPECT!>internalFun1<!>() {}            // OK: internal -> public
+    actual fun internalFun1() {}            // OK: internal -> public
     actual internal fun internalFun2() {}   // OK: internal -> internal
 
-    actual fun <!ACTUAL_WITHOUT_EXPECT!>protectedFun1<!>() {}           // OK: protected -> public
+    actual fun protectedFun1() {}           // OK: protected -> public
     actual protected fun protectedFun2() {} // OK: protected -> protected
 
     actual <!ACTUAL_WITHOUT_EXPECT!>internal<!> fun protectedFun3() {}  // BAD: protected -> internal
     actual <!ACTUAL_WITHOUT_EXPECT!>protected<!> fun internalFun3() {}  // BAD: internal -> protected
 
     actual open fun <!ACTUAL_WITHOUT_EXPECT!>openInternalFun<!>() {}    // BAD: internal+open -> public
+    actual internal fun <!ACTUAL_WITHOUT_EXPECT!>openPublicFun<!>() {}  // BAD: open+public -> internal
 }

compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.txt

@@ -8,6 +8,7 @@ public open expect class Container {
     internal final expect fun internalFun2(): kotlin.Unit
     internal final expect fun internalFun3(): kotlin.Unit
     internal open expect fun openInternalFun(): kotlin.Unit
+    public open expect fun openPublicFun(): kotlin.Unit
     protected final expect fun protectedFun1(): kotlin.Unit
     protected final expect fun protectedFun2(): kotlin.Unit
     protected final expect fun protectedFun3(): kotlin.Unit
@@ -27,6 +28,7 @@ public open actual class Container {
     internal final actual fun internalFun2(): kotlin.Unit
     protected final actual fun internalFun3(): kotlin.Unit
     public open actual fun openInternalFun(): kotlin.Unit
+    internal final actual fun openPublicFun(): kotlin.Unit
     public final actual fun protectedFun1(): kotlin.Unit
     protected final actual fun protectedFun2(): kotlin.Unit
     internal final actual fun protectedFun3(): kotlin.Unit

compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActualViaTypeAlias.kt

@@ -19,4 +19,4 @@ public class Foo {
 
 // FILE: jvm.kt
 
-actual typealias <!NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS!>Container<!> = foo.Foo
+actual typealias Container = foo.Foo