Guest accounts feature (#11428)

* MM-14139: Creating permissions for invite/promote/demote guests (#10778)

* MM-14139: Creating permissions for invite/promote/demote guests

* Fixing tests

* Adding invite guest api endpoint (#10792)

* Adding invite guest api endpoint

* Adding i18n

* Adding some tests

* WIP

* Migrating Token.Extra info to bigger size (2048)

* Fixing tests

* Adding client function for invite guests

* Adding send guests invites tests

* Renaming file from guest to guest_invite

* Adding Promote/Demote users from/to guest endpoints (#10791)

* Adding Promote/Demote users from/to guest endpoints

* Adding i18n translations

* Adding the client functions

* Using getQueryBuilder function

* Addressing PR review comments

* Adding default channels to users on promte from guest (#10851)

* Adding default channels to users on promte from guest

* Addressing PR review comments

* Fixing merge problems

* Sending websockets events on promote/demote (#11403)

* Sending websockets events on promote/demote

* Fixing merge problems

* Fixing govet shadowing problem

* Fixing feature branch tests

* Avoiding leaking users data through websockets for guest accounts (#11489)

* Avoiding leaking users data through websockets for guest accounts

* Adding tests and fixing code error

* Fixing i18n

* Allow to enable/disable guests and other extra config settings (#11481)

* Allow to enable/disable guests and other extra config settings

* Fixing tests and moving license and config validation to api level

* Update api4/role_test.go

Co-Authored-By: George Goldberg <george@gberg.me>

* Update api4/role_test.go

Co-Authored-By: George Goldberg <george@gberg.me>

* Fixing typo

* fixing tests

* Managing correctly the guest channel leave behavior (#11578)

* MM-15134: Removing guests from teams or system on leave channels if needed

* WIP

* No deactivating the guest user when leave the last team

* Adding a couple of tests

* Fixing shadow variables

* Fixing tests

* fixing tests

* fixing shadow variables

* Adding guest counts for channel stats (#11646)

* Adding guest counts for channel stats

* Adding tests

* Fixing tests

* Fixing guest domain restrictions (#11660)

* Adding needed migration for the database

* Fixing migration

model/permission.go

@@ -87,6 +87,9 @@ var PERMISSION_READ_OTHERS_BOTS *Permission
 var PERMISSION_MANAGE_BOTS *Permission
 var PERMISSION_MANAGE_OTHERS_BOTS *Permission
 var PERMISSION_VIEW_MEMBERS *Permission
+var PERMISSION_INVITE_GUEST *Permission
+var PERMISSION_PROMOTE_GUEST *Permission
+var PERMISSION_DEMOTE_TO_GUEST *Permission
 
 // General permission that encompasses all system admin functions
 // in the future this could be broken up to allow access to some
@@ -533,6 +536,25 @@ func initializePermissions() {
 		"authentication.permisssions.view_members.description",
 		PERMISSION_SCOPE_TEAM,
 	}
+	PERMISSION_INVITE_GUEST = &Permission{
+		"invite_guest",
+		"authentication.permissions.invite_guest.name",
+		"authentication.permissions.invite_guest.description",
+		PERMISSION_SCOPE_TEAM,
+	}
+	PERMISSION_PROMOTE_GUEST = &Permission{
+		"promote_guest",
+		"authentication.permissions.promote_guest.name",
+		"authentication.permissions.promote_guest.description",
+		PERMISSION_SCOPE_SYSTEM,
+	}
+
+	PERMISSION_DEMOTE_TO_GUEST = &Permission{
+		"demote_to_guest",
+		"authentication.permissions.demote_to_guest.name",
+		"authentication.permissions.demote_to_guest.description",
+		PERMISSION_SCOPE_SYSTEM,
+	}
 
 	ALL_PERMISSIONS = []*Permission{
 		PERMISSION_INVITE_USER,
@@ -606,6 +628,9 @@ func initializePermissions() {
 		PERMISSION_MANAGE_OTHERS_BOTS,
 		PERMISSION_MANAGE_SYSTEM,
 		PERMISSION_VIEW_MEMBERS,
+		PERMISSION_INVITE_GUEST,
+		PERMISSION_PROMOTE_GUEST,
+		PERMISSION_DEMOTE_TO_GUEST,
 	}
 }