UBERF-8856: Fix space security query and schema update (#7413)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

models/task/src/migration.ts

@@ -569,12 +569,6 @@ export const taskOperation: MigrateOperation = {
           await migrateSpace(client, task.space.Sequence, core.space.Workspace, [DOMAIN_KANBAN])
         }
       },
-      {
-        state: 'fix-rename-backups',
-        func: async (client: MigrationClient): Promise<void> => {
-          await client.update(DOMAIN_TASK, { '%hash%': { $exists: true } }, { $set: { '%hash%': null } })
-        }
-      },
       {
         state: 'migrateRanks',
         func: migrateRanks