Skip flaky test TestRateLimiter (#42120) (#42121)

This test is flaky, see: #42059

(cherry picked from commit df4832e)

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

x-pack/filebeat/input/entityanalytics/provider/okta/internal/okta/ratelimiter_test.go

@@ -33,6 +33,7 @@ func TestRateLimiter(t *testing.T) {
 	})
 
 	t.Run("Update stops requests when none are remaining", func(t *testing.T) {
+		t.Skip("Flaky test: https://github.com/elastic/beats/issues/42059")
 		const window = time.Minute
 		var fixedLimit *int = nil
 		r := NewRateLimiter(window, fixedLimit)