client/hs: ignore some aggressive clippy warnings.

This commit adds two `allow` directives for clippy warnings present when
building with `--no-default-features`:

1. Ignore `clippy::unnecessary_lazy_evaluations` for `find_session`. The
   suggestion to use `or` instead of `or_else` to avoid unnecessary lazy
   evaluation breaks a unit test
   (`test_client_tls12_no_resume_after_server_downgrade`).

2. Ignore `clippy::bind_instead_of_map` for `handle`. The suggestion to
   use `map` doesn't play well with the inner `match` that has a `None`
   arm for TLS 1.2 feature builds.

rustls/src/client/hs.rs

@@ -42,7 +42,7 @@ fn find_session(
     config: &ClientConfig,
     #[cfg(feature = "quic")] cx: &mut ClientContext<'_>,
 ) -> Option<persist::Retrieved<ClientSessionValue>> {
-    #[allow(clippy::let_and_return)]
+    #[allow(clippy::let_and_return, clippy::unnecessary_lazy_evaluations)]
     let found = config
         .session_storage
         .take_tls13_ticket(server_name)
@@ -614,6 +614,7 @@ impl State<ClientConnectionData> for ExpectServerHello {
         // handshake_traffic_secret.
         match suite {
             SupportedCipherSuite::Tls13(suite) => {
+                #[allow(clippy::bind_instead_of_map)]
                 let resuming_session = self
                     .resuming_session
                     .and_then(|resuming| match resuming.value {