Install rustls provider for remote websocket client (#17288)

Addresses #17283

Problem: `codex --remote wss://...` could panic because
app-server-client did not install rustls' process-level crypto provider
before opening TLS websocket connections.

Solution: Add the existing rustls provider utility dependency and
install it before the remote websocket connect.

codex-rs/Cargo.lock

@@ -1509,6 +1509,7 @@ dependencies = [
  "codex-exec-server",
  "codex-feedback",
  "codex-protocol",
+ "codex-utils-rustls-provider",
  "futures",
  "pretty_assertions",
  "serde",