[Fuzzing] Bound RunAfter duration in fuzzing event engine (#33128)

Bounds duration to 1 year. Fixes b/258949216

test/core/end2end/fuzzers/api_fuzzer_corpus/testcase-5703224922079232

@@ -0,0 +1,15 @@
+actions {
+  create_channel {
+    target: "unix:,:,2147483653,p,,,::, H?:::c23http8:::::;::::::"
+    channel_args {
+      key: "grpc.min_reconnect_backoff_ms"
+      i: 720575938231795711
+    }
+    channel_actions {
+      wait_ms: 106
+    }
+  }
+}
+actions {
+  check_connectivity: true
+}

test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.cc

@@ -40,11 +40,15 @@
 
 extern gpr_timespec (*gpr_now_impl)(gpr_clock_type clock_type);
 
+using namespace std::chrono_literals;
+
 namespace grpc_event_engine {
 namespace experimental {
 
 namespace {
 
+constexpr EventEngine::Duration kOneYear = 8760h;
+
 // Inside the fuzzing event engine we consider everything is bound to a single
 // loopback device. It cannot reach any other devices, and shares all ports
 // between ipv4 and ipv6.
@@ -466,7 +470,8 @@ EventEngine::TaskHandle FuzzingEventEngine::RunAfter(Duration when,
 EventEngine::TaskHandle FuzzingEventEngine::RunAfter(
     Duration when, absl::AnyInvocable<void()> closure) {
   grpc_core::MutexLock lock(&*mu_);
-  return RunAfterLocked(when, std::move(closure));
+  // (b/258949216): Cap it to one year to avoid integer overflow errors.
+  return RunAfterLocked(std::min(when, kOneYear), std::move(closure));
 }
 
 EventEngine::TaskHandle FuzzingEventEngine::RunAfterLocked(