Longer timeout (120 secs) for `swap_setup` protocol

Given that we combined the `spot_price` and the `execution_setup` messaging into one protocol we should allow the protocol to take longer than 60 seconds to complete.
This is especially important for connections over Tor, where messaging can take significantly longer than over clearnet.
I ran some tests with Tor and did not run into issues with the 60 seconds, but we get very close to the timeout, so we better make it more resilient by adding more time.

swap/src/network/swap_setup/alice.rs

@@ -227,7 +227,7 @@ impl<LR> Handler<LR> {
             env_config,
             latest_rate,
             resume_only,
-            timeout: Duration::from_secs(60),
+            timeout: Duration::from_secs(120),
             keep_alive: KeepAlive::Until(Instant::now() + Duration::from_secs(5)),
         }
     }

swap/src/network/swap_setup/bob.rs

@@ -109,7 +109,7 @@ impl Handler {
         Self {
             env_config,
             outbound_stream: OptionFuture::from(None),
-            timeout: Duration::from_secs(60),
+            timeout: Duration::from_secs(120),
             new_swaps: VecDeque::default(),
             bitcoin_wallet,
             keep_alive: KeepAlive::Until(Instant::now() + Duration::from_secs(5)),