fixup! Add integration test for manual rollback after grace period

Author: pchila

testing/integration/ess/upgrade_rollback_test.go

@@ -460,7 +460,10 @@ func TestStandaloneUpgradeManualRollback(t *testing.T) {
 					assert.Equal(t, cproto.State_HEALTHY, state.State)
 					assert.Equal(collect, expectedVersion, state.Info.Version)
 					assert.Equal(collect, expectedSnapshot, state.Info.Snapshot)
-					assert.NoFileExists(collect, filepath.Join(startFixture.WorkDir(), "data", ".update-marker"))
+					if runtime.GOOS != "windows" {
+						// on windows the update marker is not removed when cleaning up
+						assert.NoFileExists(collect, filepath.Join(startFixture.WorkDir(), "data", ".update-marker"))
+					}
 				}, 4*time.Minute, 10*time.Second)
 				t.Log("elastic agent is out of grace period.")
 				t.Logf("sending version=%s rollback=%v upgrade to agent", startFixture.Version(), true)