fix(ci): add missing isUserTeamAdminForAnyTeam mock to leftnav test

The leftnav component now imports isUserTeamAdminForAnyTeam from
utils/roles, but the test mock didn't include it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/litellm-dashboard/src/components/leftnav.test.tsx

@@ -9,6 +9,7 @@ vi.mock("../utils/roles", () => {
     internalUserRoles: ["internal"],
     rolesWithWriteAccess: ["admin", "internal"],
     isAdminRole: (role: string) => role === "admin",
+    isUserTeamAdminForAnyTeam: () => false,
   };
 });