Skip failing/flaky nginx stubstatus integration tests (#38648) (#38657)

The integration test is failing and blocking CI, hence we're skipping
it for now. More details on
#38569.

Co-authored-by: subham sarkar <subham.sarkar@elastic.co>
(cherry picked from commit 23ec4e9)

Co-authored-by: Tiago Queiroz <tiago.queiroz@elastic.co>

metricbeat/module/nginx/stubstatus/stubstatus_integration_test.go

@@ -29,6 +29,7 @@ import (
 )
 
 func TestFetch(t *testing.T) {
+	t.Skip("Skipping due to flakiness, see 'https://github.com/elastic/beats/issues/38569'")
 	service := compose.EnsureUp(t, "nginx")
 
 	f := mbtest.NewReportingMetricSetV2Error(t, getConfig(service.Host()))
@@ -46,6 +47,7 @@ func TestFetch(t *testing.T) {
 }
 
 func TestData(t *testing.T) {
+	t.Skip("Skipping due to flakiness, see 'https://github.com/elastic/beats/issues/38569'")
 	service := compose.EnsureUp(t, "nginx")
 
 	f := mbtest.NewReportingMetricSetV2Error(t, getConfig(service.Host()))