MM-22153: Adds tracking of channel moderation. (#14095)

* MM-22153: Adds tracking of channel moderation.

* MM-22153: Fixes test setup.

* MM-22153: Split role constants into scope and type.

model/role.go

@@ -9,6 +9,9 @@ import (
 	"strings"
 )
 
+type RoleType string
+type RoleScope string
+
 const (
 	SYSTEM_GUEST_ROLE_ID             = "system_guest"
 	SYSTEM_USER_ROLE_ID              = "system_user"
@@ -30,6 +33,14 @@ const (
 	ROLE_NAME_MAX_LENGTH         = 64
 	ROLE_DISPLAY_NAME_MAX_LENGTH = 128
 	ROLE_DESCRIPTION_MAX_LENGTH  = 1024
+
+	RoleScopeSystem  RoleScope = "System"
+	RoleScopeTeam    RoleScope = "Team"
+	RoleScopeChannel RoleScope = "Channel"
+
+	RoleTypeGuest RoleType = "Guest"
+	RoleTypeUser  RoleType = "User"
+	RoleTypeAdmin RoleType = "Admin"
 )
 
 type Role struct {