IR: don't attempt to move defaults to actual in another module

May happen when a function in an `expect` class is aliased through an
`actual typealias`; the matching declaration is filtered out in
`ExpectedActualResolver.findActualForExpected` as it has no source.

compiler/testData/codegen/boxAgainstJava/multiplatform/annotationsViaActualTypeAliasFromBinary.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +MultiPlatformProjects
-// IGNORE_BACKEND: JVM_IR
 // WITH_REFLECT
 // FILE: main.kt