increase spin up timeout to 2 minutes to fix CI

We're not sure yet why we've started consistently exceeding the old 20 second
timeout on tests which run in a 2-3 seconds locally, but that's what's
happening.  If it turns out even 2 minutes is insufficient, we'll need to dig
deeper.

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

tests/testing-framework/src/spin.rs

@@ -55,13 +55,13 @@ impl Spin {
                 );
             }
 
-            if start.elapsed() > std::time::Duration::from_secs(20) {
+            if start.elapsed() > std::time::Duration::from_secs(2 * 60) {
                 break;
             }
             std::thread::sleep(std::time::Duration::from_millis(50));
         }
         anyhow::bail!(
-            "`spin up` did not start server or error after 20 seconds. stderr:\n\t{}",
+            "`spin up` did not start server or error after two minutes. stderr:\n\t{}",
             spin.stderr.output_as_str().unwrap_or("<non-utf8>")
         )
     }