[psi2ir] Ignore private members when creating fake overrides from descriptors

The behavior is unified with the IR deserializer.
See `isOverridableMemberOrAccessor` in IrOverridingUtil.kt

Without this change, if we add a private member to the Any in wasm stdlib,
the compiler starts crashing with a linker error.

It's hard to write a relevant, self-contained box test for that since it requires
adding a private member to Any and affects **only** "virtual" FunctionN interfaces.

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/descriptors/IrDescriptorBasedFunctionFactory.kt

@@ -351,8 +351,11 @@ class IrDescriptorBasedFunctionFactory(
 
     private fun IrClass.addFakeOverrides() {
 
-        val fakeOverrideDescriptors = descriptor.unsubstitutedMemberScope.getContributedDescriptors(DescriptorKindFilter.CALLABLES)
-            .filterIsInstance<CallableMemberDescriptor>().filter { it.kind === CallableMemberDescriptor.Kind.FAKE_OVERRIDE }
+        val fakeOverrideDescriptors =
+            descriptor.unsubstitutedMemberScope.getContributedDescriptors(DescriptorKindFilter.CALLABLES).asSequence()
+                .filterIsInstance<CallableMemberDescriptor>()
+                .filter { it.kind === CallableMemberDescriptor.Kind.FAKE_OVERRIDE && it.dispatchReceiverParameter != null }
+                .filter { !DescriptorVisibilities.isPrivate(it.visibility) && it.visibility != DescriptorVisibilities.INVISIBLE_FAKE }
 
         fun createFakeOverrideFunction(descriptor: FunctionDescriptor, property: IrPropertySymbol?): IrSimpleFunction {
             val returnType = descriptor.returnType?.let { toIrType(it) } ?: error("No return type for $descriptor")