fix: guard macos-ne feature with target_os = "macos" in cfg expressions (#1962)

All 13 occurrences of `any(target_os = "ios", feature = "macos-ne")` are
replaced with `any(target_os = "ios", all(target_os = "macos", feature = "macos-ne"))`.

Previously, enabling `macos-ne` on non-macOS platforms (e.g. `--all-features`
on Linux) would incorrectly compile macOS/mobile-specific code paths, causing
build failures or wrong runtime behavior.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

easytier/src/connector/mod.rs

@@ -36,7 +36,10 @@ async fn set_bind_addr_for_peer_connector(
 ) {
     if cfg!(any(
         target_os = "android",
-        any(target_os = "ios", feature = "macos-ne"),
+        any(
+            target_os = "ios",
+            all(target_os = "macos", feature = "macos-ne")
+        ),
         target_env = "ohos"
     )) {
         return;