Use test context in tests and new loop system in benchmarks (#33648)

Replace all contexts in tests with go1.24 t.Context()

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/gtprof/trace_test.go

@@ -51,7 +51,7 @@ func (t *testTraceStarter) start(ctx context.Context, traceSpan *TraceSpan, inte
 func TestTraceStarter(t *testing.T) {
 	globalTraceStarters = []traceStarter{&testTraceStarter{}}
 
-	ctx := context.Background()
+	ctx := t.Context()
 	ctx, span := GetTracer().Start(ctx, "root")
 	defer span.End()