v8.0 module release (#22975)

https://mattermost.atlassian.net/browse/MM-52079

```release-note
We upgrade the module version to 8.0. The new module path is github.com/mattermost-server/server/v8.
```


Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

server/platform/services/remotecluster/invitation.go

@@ -8,7 +8,7 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 // AcceptInvitation is called when accepting an invitation to connect with a remote cluster.

server/platform/services/remotecluster/mocks_test.go

@@ -6,12 +6,12 @@ package remotecluster
 import (
 	"context"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/plugin/plugintest/mock"
-	"github.com/mattermost/mattermost-server/v6/server/channels/einterfaces"
-	"github.com/mattermost/mattermost-server/v6/server/channels/store"
-	"github.com/mattermost/mattermost-server/v6/server/channels/store/storetest/mocks"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/channels/einterfaces"
+	"github.com/mattermost/mattermost-server/server/v8/channels/store"
+	"github.com/mattermost/mattermost-server/server/v8/channels/store/storetest/mocks"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/plugin/plugintest/mock"
 )
 
 type mockServer struct {

server/platform/services/remotecluster/ping.go

@@ -8,8 +8,8 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 // pingLoop periodically sends a ping to all remote clusters.

server/platform/services/remotecluster/ping_test.go

@@ -16,7 +16,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/wiggin77/merror"
 
-	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 const (

server/platform/services/remotecluster/recv.go

@@ -6,8 +6,8 @@ package remotecluster
 import (
 	"fmt"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 // ReceiveIncomingMsg is called by the Rest API layer, or websocket layer (future), when a Remote Cluster

server/platform/services/remotecluster/send_test.go

@@ -18,7 +18,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/wiggin77/merror"
 
-	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 const (

server/platform/services/remotecluster/sendfile.go

@@ -13,9 +13,9 @@ import (
 	"path"
 	"time"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/filestore"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/filestore"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 type SendFileResultFunc func(us *model.UploadSession, rc *model.RemoteCluster, resp *Response, err error)

server/platform/services/remotecluster/sendmsg.go

@@ -17,8 +17,8 @@ import (
 
 	"github.com/wiggin77/merror"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 type SendMsgResultFunc func(msg model.RemoteClusterMsg, rc *model.RemoteCluster, resp *Response, err error)

server/platform/services/remotecluster/sendprofileImage.go

@@ -14,8 +14,8 @@ import (
 	"path"
 	"time"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 type SendProfileImageResultFunc func(userId string, rc *model.RemoteCluster, resp *Response, err error)

server/platform/services/remotecluster/sendprofileImage_test.go

@@ -18,7 +18,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 const (

server/platform/services/remotecluster/service.go

@@ -10,10 +10,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/channels/einterfaces"
-	"github.com/mattermost/mattermost-server/v6/server/channels/store"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	"github.com/mattermost/mattermost-server/server/v8/channels/einterfaces"
+	"github.com/mattermost/mattermost-server/server/v8/channels/store"
+	"github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 const (

server/platform/services/remotecluster/service_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 func TestService_AddTopicListener(t *testing.T) {