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/model/user_get.go

@@ -0,0 +1,48 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+type UserGetOptions struct {
+	// Filters the users in the team
+	InTeamId string
+	// Filters the users not in the team
+	NotInTeamId string
+	// Filters the users in the channel
+	InChannelId string
+	// Filters the users not in the channel
+	NotInChannelId string
+	// Filters the users in the group
+	InGroupId string
+	// Filters the users not in the group
+	NotInGroupId string
+	// Filters the users group constrained
+	GroupConstrained bool
+	// Filters the users without a team
+	WithoutTeam bool
+	// Filters the inactive users
+	Inactive bool
+	// Filters the active users
+	Active bool
+	// Filters for the given role
+	Role string
+	// Filters for users matching any of the given system wide roles
+	Roles []string
+	// Filters for users matching any of the given channel roles, must be used with InChannelId
+	ChannelRoles []string
+	// Filters for users matching any of the given team roles, must be used with InTeamId
+	TeamRoles []string
+	// Sorting option
+	Sort string
+	// Restrict to search in a list of teams and channels
+	ViewRestrictions *ViewUsersRestrictions
+	// Page
+	Page int
+	// Page size
+	PerPage int
+}
+
+type UserGetByIdsOptions struct {
+	// Since filters the users based on their UpdateAt timestamp.
+	Since int64
+}