MM-53032: Fix module path after repo rename (#23689)

It was a good decision in hindsight to keep the public module as 0.x
because this would have been a breaking change again.

https://mattermost.atlassian.net/browse/MM-53032
```release-note
Changed the Go module path from github.com/mattermost/mattermost-server/server/v8 to github.com/mattermost/mattermost/server/v8.

For the public facing module, it's path is also changed from github.com/mattermost/mattermost-server/server/public to github.com/mattermost/mattermost/server/public
```

server/channels/app/users/helper_test.go

@@ -10,10 +10,10 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
-	"github.com/mattermost/mattermost-server/server/v8/channels/app/request"
-	"github.com/mattermost/mattermost-server/server/v8/channels/store"
-	"github.com/mattermost/mattermost-server/server/v8/config"
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/v8/channels/app/request"
+	"github.com/mattermost/mattermost/server/v8/channels/store"
+	"github.com/mattermost/mattermost/server/v8/config"
 )
 
 var initBasicOnce sync.Once

server/channels/app/users/main_test.go

@@ -7,7 +7,7 @@ import (
 	"flag"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/server/v8/channels/testlib"
+	"github.com/mattermost/mattermost/server/v8/channels/testlib"
 )
 
 var mainHelper *testlib.MainHelper

server/channels/app/users/password.go

@@ -9,7 +9,7 @@ import (
 
 	"golang.org/x/crypto/bcrypt"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
+	"github.com/mattermost/mattermost/server/public/model"
 )
 
 func CheckUserPassword(user *model.User, password string) error {

server/channels/app/users/password_test.go

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

server/channels/app/users/profile_picture.go

@@ -19,9 +19,9 @@ import (
 	"github.com/golang/freetype"
 	"github.com/golang/freetype/truetype"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
-	"github.com/mattermost/mattermost-server/server/v8/channels/utils/fileutils"
-	"github.com/mattermost/mattermost-server/server/v8/platform/shared/filestore"
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/v8/channels/utils/fileutils"
+	"github.com/mattermost/mattermost/server/v8/platform/shared/filestore"
 )
 
 const (

server/channels/app/users/service.go

@@ -6,9 +6,9 @@ package users
 import (
 	"errors"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
-	"github.com/mattermost/mattermost-server/server/v8/channels/store"
-	"github.com/mattermost/mattermost-server/server/v8/einterfaces"
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/v8/channels/store"
+	"github.com/mattermost/mattermost/server/v8/einterfaces"
 )
 
 type UserService struct {

server/channels/app/users/service_test.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/stretchr/testify/require"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
+	"github.com/mattermost/mattermost/server/public/model"
 )
 
 func TestNew(t *testing.T) {

server/channels/app/users/users.go

@@ -8,11 +8,11 @@ import (
 	"encoding/base64"
 	"fmt"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
-	"github.com/mattermost/mattermost-server/server/public/shared/i18n"
-	"github.com/mattermost/mattermost-server/server/public/shared/mlog"
-	"github.com/mattermost/mattermost-server/server/v8/channels/store"
-	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mfa"
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/public/shared/i18n"
+	"github.com/mattermost/mattermost/server/public/shared/mlog"
+	"github.com/mattermost/mattermost/server/v8/channels/store"
+	"github.com/mattermost/mattermost/server/v8/platform/shared/mfa"
 
 	"github.com/pkg/errors"
 )

server/channels/app/users/users_test.go

@@ -6,7 +6,7 @@ package users
 import (
 	"testing"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
+	"github.com/mattermost/mattermost/server/public/model"
 
 	"github.com/stretchr/testify/require"
 )

server/channels/app/users/utils.go

@@ -6,7 +6,7 @@ package users
 import (
 	"strings"
 
-	"github.com/mattermost/mattermost-server/server/public/model"
+	"github.com/mattermost/mattermost/server/public/model"
 )
 
 // CheckUserDomain checks that a user's email domain matches a list of space-delimited domains as a string.