Add test for dangling file/dir handles (#566)

* Add test for dangling file/dir handles

This commit adds a test for dangling file/dir handles. The logic is
quite simple: we first create a resource (file or dir), get a WASI file
descriptor to it, remove the resource without closing the FD, and then
try to re-create it.

* Disable on Windows for now

crates/test-programs/build.rs

@@ -168,6 +168,7 @@ cfg_if::cfg_if! {
                     "truncation_rights" => true,
                     "poll_oneoff" => true,
                     "path_link" => true,
+                    "dangling_fd" => true,
                     _ => false,
                 }
             } else {