Enable agent container e2e tests (#4870)

* Enable agent container e2e tests

* Add a retry for integration and e2e tests

* Try setting ryuk to priviledged container

Author: michel-laterman

.buildkite/pipeline.yml

@@ -149,10 +149,15 @@ steps:
         plugins:
           - *bk_analytics_token_plugin
           - *test_collector_plugin
+        retry:
+          automatic:
+            limit: 1
 
       - label: "E2E Test"
         key: "e2e-test"
         command: ".buildkite/scripts/e2e_test.sh"
+        env:
+          TESTCONTAINERS_RYUK_CONTAINER_PRIVILEGED: "true"
         agents:
           provider: "gcp"
         artifact_paths:
@@ -161,6 +166,9 @@ steps:
         plugins:
           - *bk_analytics_token_plugin
           - *test_collector_plugin
+        retry:
+          automatic:
+            limit: 1
 
       - label: ":junit: Junit annotate"
         plugins:

testing/e2e/agent_container_test.go

@@ -37,7 +37,6 @@ type AgentContainerSuite struct {
 }
 
 func TestAgentContainerSuite(t *testing.T) {
-	t.Skip("Flakey test suite skipped. See https://github.com/elastic/fleet-server/issues/3909")
 	suite.Run(t, new(AgentContainerSuite))
 }