fix(file-assertions): fix method fileTree to compare realPath of pare…

…nt with subdirectories, issue #3001

Signed-off-by: arman-yekkehkhani <arman.yekkehkhani@gmail.com>
(cherry picked from commit 2442766)

jkube-kit/common/src/test/java/org/eclipse/jkube/kit/common/assertj/FileAssertions.java

@@ -42,7 +42,7 @@ public static FileAssertions assertThat(File file) {
   public AbstractListAssert<ListAssert<String>, List<? extends String>, String, ObjectAssert<String>> fileTree()
       throws IOException {
 
-    final Path actualPath = actual.toPath().normalize();
+    final Path actualPath = actual.toPath().normalize().toRealPath();
     final List<String> paths = new ArrayList<>();
     try (Stream<Path> pathStream = Files.walk(actualPath)) {
       for (Path temp : pathStream