tenantrate: deflake testcloser

This patch increases the request size in `TestCloser` in order to jam
the request, to assert on timers closing. An earlier patch lowered the
RU cost below the burst threshold, making it so that this request never
waited.

The test previously flaked after 1 run.

`53538 runs so far, 0 failures, over 2m5s`

resolves: #86822

Release note: None

pkg/kv/kvserver/tenantrate/BUILD.bazel

@@ -41,7 +41,6 @@ go_test(
         "//pkg/settings/cluster",
         "//pkg/testutils",
         "//pkg/testutils/metrictestutils",
-        "//pkg/testutils/skip",
         "//pkg/util/leaktest",
         "//pkg/util/metric",
         "//pkg/util/timeutil",

pkg/kv/kvserver/tenantrate/limiter_test.go

@@ -26,7 +26,6 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/settings/cluster"
 	"github.com/cockroachdb/cockroach/pkg/testutils"
 	"github.com/cockroachdb/cockroach/pkg/testutils/metrictestutils"
-	"github.com/cockroachdb/cockroach/pkg/testutils/skip"
 	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
 	"github.com/cockroachdb/cockroach/pkg/util/metric"
 	"github.com/cockroachdb/cockroach/pkg/util/timeutil"
@@ -39,8 +38,6 @@ import (
 
 func TestCloser(t *testing.T) {
 	defer leaktest.AfterTest(t)()
-	skip.WithIssue(t, 86822, "flaky test")
-
 	st := cluster.MakeTestingClusterSettings()
 	start := timeutil.Now()
 	timeSource := timeutil.NewManualTime(start)
@@ -54,7 +51,7 @@ func TestCloser(t *testing.T) {
 	// First Wait call will not block.
 	require.NoError(t, limiter.Wait(ctx, tenantcostmodel.TestingRequestInfo(1, 1, 1)))
 	errCh := make(chan error, 1)
-	go func() { errCh <- limiter.Wait(ctx, tenantcostmodel.TestingRequestInfo(1, 1, 1<<30)) }()
+	go func() { errCh <- limiter.Wait(ctx, tenantcostmodel.TestingRequestInfo(1, 1, 1<<31)) }()
 	testutils.SucceedsSoon(t, func() error {
 		if timers := timeSource.Timers(); len(timers) != 1 {
 			return errors.Errorf("expected 1 timer, found %d", len(timers))