fix(perf): Prevents settings route from marking "Performance" in sidebar as active (#77946)

There's a `/settings/projects/<project-slug>performance/` URL that
activates the "Performance" sidebar item because it's using an inexact
URL match. Omit Settings pages the same way other paths do this. Yucky
but works for now!

static/app/components/sidebar/sidebarItem.tsx

@@ -335,7 +335,9 @@ export function isItemActive(
       location.pathname.includes('/alerts/') &&
       !location.pathname.startsWith('/settings/')) ||
     (item?.label === 'Releases' && location.pathname.includes('/release-thresholds/')) ||
-    (item?.label === 'Performance' && location.pathname.includes('/performance/'))
+    (item?.label === 'Performance' &&
+      location.pathname.includes('/performance/') &&
+      !location.pathname.startsWith('/settings/'))
   );
 }