test(procmgr): restore PAR Windows E2E with LocalSystem procmgr

Re-add the test dropped from #54731. Agent-profile spawn for PAR requires
dd-procmgr-service as LocalSystem (Wix change in this PR) to read the
agent password from LSA.

Author: jose-manuel-almaza

test/new-e2e/tests/agent-runtimes/procmgr/BUILD.bazel

@@ -3,6 +3,7 @@ load("//bazel/rules/go:dd_agent_go_test.bzl", "dd_agent_go_test")
 dd_agent_go_test(
     name = "procmgr_test",
     srcs = [
+        "par_procmgr_win_test.go",
         "procmgr_common_test.go",
         "procmgr_nix_test.go",
         "procmgr_win_test.go",
@@ -16,6 +17,7 @@ dd_agent_go_test(
         "//test/e2e-framework/testing/environments",
         "//test/e2e-framework/testing/provisioners/aws/host",
         "//test/e2e-framework/testing/utils/e2e/client/agentclient",
+        "//test/new-e2e/tests/privateactionrunner",
         "//test/new-e2e/tests/windows/common/agent",
         "@com_github_pulumi_pulumi_sdk_v3//go/pulumi",
         "@com_github_stretchr_testify//assert",

test/new-e2e/tests/agent-runtimes/procmgr/par_procmgr_win_test.go

@@ -0,0 +1,83 @@
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016-present Datadog, Inc.
+
+package procmgr
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/DataDog/datadog-agent/test/e2e-framework/components/datadog/agentparams"
+	e2eos "github.com/DataDog/datadog-agent/test/e2e-framework/components/os"
+	"github.com/DataDog/datadog-agent/test/e2e-framework/scenarios/aws/ec2"
+	"github.com/DataDog/datadog-agent/test/e2e-framework/testing/e2e"
+	"github.com/DataDog/datadog-agent/test/e2e-framework/testing/environments"
+	awshost "github.com/DataDog/datadog-agent/test/e2e-framework/testing/provisioners/aws/host"
+	paridentity "github.com/DataDog/datadog-agent/test/new-e2e/tests/privateactionrunner"
+	windowsagent "github.com/DataDog/datadog-agent/test/new-e2e/tests/windows/common/agent"
+)
+
+const (
+	parProcessName           = "datadog-agent-action"
+	parLegacySCMServiceName  = "datadog-agent-action"
+	parProcmgrConfigFileName = "datadog-agent-action.yaml"
+)
+
+type parProcmgrWindowsSuite struct {
+	e2e.BaseSuite[environments.Host]
+}
+
+func TestPARManagedByProcmgrWindows(t *testing.T) {
+	t.Parallel()
+	config := paridentity.GenerateTestPrivateActionRunnerConfig(t)
+	e2e.Run(t, &parProcmgrWindowsSuite{}, e2e.WithProvisioner(
+		awshost.ProvisionerNoFakeIntake(
+			awshost.WithRunOptions(
+				ec2.WithEC2InstanceOptions(ec2.WithOS(e2eos.WindowsServerDefault), ec2.WithInternetAccess()),
+				ec2.WithAgentOptions(agentparams.WithAgentConfig(config)),
+			),
+		),
+	))
+}
+
+func (s *parProcmgrWindowsSuite) TestPARSupervisedByProcmgrAndLegacySCMStopped() {
+	host := s.Env().RemoteHost
+	installRoot, err := windowsagent.GetInstallPathFromRegistry(host)
+	require.NoError(s.T(), err)
+
+	parBin := filepath.Join(installRoot, "bin", "agent", "privateactionrunner.exe")
+	exists, err := host.FileExists(parBin)
+	require.NoError(s.T(), err)
+	if !exists {
+		s.T().Skip("privateactionrunner.exe not installed; skipping PAR procmgr test")
+	}
+
+	cfg := filepath.Join(installRoot, "processes.d", parProcmgrConfigFileName)
+	exists, err = host.FileExists(cfg)
+	require.NoError(s.T(), err)
+	require.True(s.T(), exists, "fleet PAR processes.d config should exist at %s", cfg)
+
+	cli := filepath.Join(installRoot, "bin", "agent", "dd-procmgr.exe")
+	require.EventuallyWithT(s.T(), func(ct *assert.CollectT) {
+		out, err := host.Execute(fmt.Sprintf(`& "%s" describe %s`, cli, parProcessName))
+		assert.NoError(ct, err)
+		assert.Contains(ct, out, "State")
+		assert.Contains(ct, out, "Running")
+	}, 120*time.Second, 3*time.Second)
+
+	out, err := host.Execute(fmt.Sprintf(
+		`$s = Get-Service -Name '%s' -ErrorAction SilentlyContinue; if ($null -eq $s) { 'Absent' } else { $s.Status }`,
+		parLegacySCMServiceName,
+	))
+	require.NoError(s.T(), err)
+	require.NotEqual(s.T(), "Running", strings.TrimSpace(out),
+		"%s Windows service must not be Running when PAR is managed by dd-procmgr", parLegacySCMServiceName)
+}