Fix roles table ID max length so MySQL 5.6 doesn't fail. (#8532)

store/sqlstore/role_supplier.go

@@ -67,6 +67,7 @@ func (role Role) ToModel() *model.Role {
 func initSqlSupplierRoles(sqlStore SqlStore) {
 	for _, db := range sqlStore.GetAllConns() {
 		table := db.AddTableWithName(Role{}, "Roles").SetKeys(false, "Id")
+		table.ColMap("Id").SetMaxSize(26)
 		table.ColMap("Name").SetMaxSize(64).SetUnique(true)
 		table.ColMap("DisplayName").SetMaxSize(128)
 		table.ColMap("Description").SetMaxSize(1024)