chore(tests): name integration test packages correctly to let them run (#10242)

# Which Problems Are Solved

After changing some internal logic, which should have failed the
integration test, but didn't, I noticed that some integration tests were
never executed. The make command lists all `integration_test` packages,
but some are named `integration`

# How the Problems Are Solved

Correct wrong integration test package names.

# Additional Changes

None

# Additional Context

- noticed internally
- backport to 3.x and 2.x

internal/api/grpc/project/v2beta/integration_test/server_test.go

@@ -0,0 +1,63 @@
+//go:build integration
+
+package project_test
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/muhlemmer/gu"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/zitadel/zitadel/internal/integration"
+	"github.com/zitadel/zitadel/pkg/grpc/feature/v2"
+)
+
+var (
+	CTX                  context.Context
+	instance             *integration.Instance
+	instancePermissionV2 *integration.Instance
+)
+
+func TestMain(m *testing.M) {
+	os.Exit(func() int {
+		ctx, cancel := context.WithTimeout(context.Background(), 15*time.Minute)
+		defer cancel()
+		CTX = ctx
+		instance = integration.NewInstance(ctx)
+		instancePermissionV2 = integration.NewInstance(CTX)
+		return m.Run()
+	}())
+}
+
+func ensureFeaturePermissionV2Enabled(t *testing.T, instance *integration.Instance) {
+	ctx := instance.WithAuthorization(CTX, integration.UserTypeIAMOwner)
+	f, err := instance.Client.FeatureV2.GetInstanceFeatures(ctx, &feature.GetInstanceFeaturesRequest{
+		Inheritance: true,
+	})
+	require.NoError(t, err)
+	if f.PermissionCheckV2.GetEnabled() {
+		return
+	}
+	_, err = instance.Client.FeatureV2.SetInstanceFeatures(ctx, &feature.SetInstanceFeaturesRequest{
+		PermissionCheckV2: gu.Ptr(true),
+	})
+	require.NoError(t, err)
+	retryDuration, tick := integration.WaitForAndTickWithMaxDuration(ctx, 5*time.Minute)
+	require.EventuallyWithT(t,
+		func(ttt *assert.CollectT) {
+			f, err := instance.Client.FeatureV2.GetInstanceFeatures(ctx, &feature.GetInstanceFeaturesRequest{
+				Inheritance: true,
+			})
+			assert.NoError(ttt, err)
+			if f.PermissionCheckV2.GetEnabled() {
+				return
+			}
+		},
+		retryDuration,
+		tick,
+		"timed out waiting for ensuring instance feature")
+}