[flake] Raise deadline to eliminate flake in request_with_payload (#33488)

Observed on CI over the weekend (and quite reproducible)

---------

Co-authored-by: ctiller <ctiller@users.noreply.github.com>

test/core/end2end/tests/request_with_payload.cc

@@ -16,10 +16,12 @@
 //
 //
 
+#include "absl/strings/str_cat.h"
 #include "gtest/gtest.h"
 
 #include <grpc/status.h>
 
+#include "src/core/lib/gprpp/crash.h"
 #include "src/core/lib/gprpp/time.h"
 #include "test/core/end2end/end2end_tests.h"
 
@@ -27,7 +29,7 @@ namespace grpc_core {
 namespace {
 
 CORE_END2END_TEST(CoreEnd2endTest, RequestWithPayload) {
-  auto c = NewClientCall("/foo").Timeout(Duration::Seconds(5)).Create();
+  auto c = NewClientCall("/foo").Timeout(Duration::Seconds(30)).Create();
   IncomingMetadata server_initial_metadata;
   IncomingStatusOnClient server_status;
   c.NewBatch(1)
@@ -38,6 +40,12 @@ CORE_END2END_TEST(CoreEnd2endTest, RequestWithPayload) {
       .RecvStatusOnClient(server_status);
   auto s = RequestCall(101);
   Expect(101, true);
+  Expect(1, CoreEnd2endTest::MaybePerformAction{[&](bool success) {
+           Crash(absl::StrCat(
+               "Unexpected completion of client side call: success=",
+               success ? "true" : "false", " status=", server_status.ToString(),
+               " initial_md=", server_initial_metadata.ToString()));
+         }});
   Step();
   IncomingMessage client_message;
   s.NewBatch(102).SendInitialMetadata({}).RecvMessage(client_message);