add check_replicas_before_attach configuration to avoid concurrent ATTACH PART execution during restore command

[Slach]

to avoid multiple ATTACH PART from concurrent replicas in the same shard to replicated tables

Let’s make an option to ClickHouse backup that would add an extra step.
Before restoring a table run the following query:

select log_pointer + absolute_delay from system.replicas where database=? and table=?

If result is empty or result is zero, then we can restore. Otherwise, table is not empty or is being restored from another replica.