Sort patches by numeric index, not path

This may have caused patches to be applied in the wrong order; that should now
be fixed. In practice I think our patches likely worked out the same, but hard
to be sure. A quick check with sort and sort -n seems to imply things are
probably fine, but it may not have worked.

Author: Mark-Simulacrum

collector/src/execute.rs

@@ -1166,9 +1166,8 @@ impl Benchmark {
             }
         }
 
-        patches.sort();
-
-        let patches = patches.into_iter().map(|p| Patch::new(p)).collect();
+        let mut patches: Vec<_> = patches.into_iter().map(|p| Patch::new(p)).collect();
+        patches.sort_by_key(|p| p.index);
 
         let config_path = path.join("perf-config.json");
         let config: BenchmarkConfig = if config_path.exists() {