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/boards/services/permissions/localpermissions/helpers_test.go

@@ -6,11 +6,11 @@ package localpermissions
 import (
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
-	permissionsMocks "github.com/mattermost/mattermost-server/v6/server/boards/services/permissions/mocks"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
+	permissionsMocks "github.com/mattermost/mattermost-server/server/v8/boards/services/permissions/mocks"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/assert"

server/boards/services/permissions/localpermissions/localpermissions.go

@@ -4,11 +4,11 @@
 package localpermissions
 
 import (
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
-	"github.com/mattermost/mattermost-server/v6/server/boards/services/permissions"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
+	"github.com/mattermost/mattermost-server/server/v8/boards/services/permissions"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 type Service struct {

server/boards/services/permissions/localpermissions/localpermissions_test.go

@@ -7,9 +7,9 @@ import (
 	"database/sql"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
 
 	"github.com/stretchr/testify/assert"
 )

server/boards/services/permissions/mmpermissions/helpers_test.go

@@ -6,12 +6,12 @@ package mmpermissions
 import (
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
-	mmpermissionsMocks "github.com/mattermost/mattermost-server/v6/server/boards/services/permissions/mmpermissions/mocks"
-	permissionsMocks "github.com/mattermost/mattermost-server/v6/server/boards/services/permissions/mocks"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
+	mmpermissionsMocks "github.com/mattermost/mattermost-server/server/v8/boards/services/permissions/mmpermissions/mocks"
+	permissionsMocks "github.com/mattermost/mattermost-server/server/v8/boards/services/permissions/mocks"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/assert"

server/boards/services/permissions/mmpermissions/mmpermissions.go

@@ -4,11 +4,11 @@
 package mmpermissions
 
 import (
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
-	"github.com/mattermost/mattermost-server/v6/server/boards/services/permissions"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
+	"github.com/mattermost/mattermost-server/server/v8/boards/services/permissions"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
-	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
+	"github.com/mattermost/mattermost-server/server/v8/platform/shared/mlog"
 )
 
 type APIInterface interface {

server/boards/services/permissions/mmpermissions/mmpermissions_test.go

@@ -1,16 +1,16 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
-//go:generate mockgen -copyright_file=../../../../copyright.txt -destination=mocks/mockpluginapi.go -package mocks github.com/mattermost/mattermost-server/v6/plugin API
+//go:generate mockgen -copyright_file=../../../../copyright.txt -destination=mocks/mockpluginapi.go -package mocks github.com/mattermost/mattermost-server/server/v8/plugin API
 package mmpermissions
 
 import (
 	"database/sql"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
 
 	"github.com/stretchr/testify/assert"
 )

server/boards/services/permissions/mmpermissions/mocks/mockpluginapi.go

@@ -2,7 +2,7 @@
 // See LICENSE.txt for license information.
 
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/mattermost/mattermost-server/v6/plugin (interfaces: API)
+// Source: github.com/mattermost/mattermost-server/server/v8/plugin (interfaces: API)
 
 // Package mocks is a generated GoMock package.
 package mocks
@@ -13,7 +13,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
-	model "github.com/mattermost/mattermost-server/v6/model"
+	model "github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 // MockAPI is a mock of API interface.

server/boards/services/permissions/mocks/mockstore.go

@@ -2,7 +2,7 @@
 // See LICENSE.txt for license information.
 
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/mattermost/mattermost-server/v6/server/boards/services/permissions (interfaces: Store)
+// Source: github.com/mattermost/mattermost-server/server/v8/boards/services/permissions (interfaces: Store)
 
 // Package mocks is a generated GoMock package.
 package mocks
@@ -11,7 +11,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
-	model "github.com/mattermost/mattermost-server/v6/server/boards/model"
+	model "github.com/mattermost/mattermost-server/server/v8/boards/model"
 )
 
 // MockStore is a mock of Store interface.

server/boards/services/permissions/permissions.go

@@ -6,9 +6,9 @@
 package permissions
 
 import (
-	"github.com/mattermost/mattermost-server/v6/server/boards/model"
+	"github.com/mattermost/mattermost-server/server/v8/boards/model"
 
-	mm_model "github.com/mattermost/mattermost-server/v6/model"
+	mm_model "github.com/mattermost/mattermost-server/server/v8/model"
 )
 
 type PermissionsService interface {