[#12474]: Update 'makeOpenPath parent dirs do not exist' test case

See this discussion #14833 (comment) for more Info

lib/std/fs/test.zig

@@ -476,10 +476,15 @@ test "file operations on directories" {
 }
 
 test "makeOpenPath parent dirs do not exist" {
-    if (builtin.os.tag == .wasi) return error.SkipZigTest;
+    var tmp_dir = tmpDir(.{});
+    defer tmp_dir.cleanup();
 
-    var dir = try fs.cwd().makeOpenPath("root_dir/parent_dir/some_dir", .{});
-    defer dir.close();
+    var dir = try tmp_dir.dir.makeOpenPath("root_dir/parent_dir/some_dir", .{});
+    dir.close();
+
+    // double check that the full directory structure was created
+    var dir_verification = try tmp_dir.dir.openDir("root_dir/parent_dir/some_dir", .{});
+    dir_verification.close();
 }
 
 test "deleteDir" {