memtx: throw an instance of ClientError to correctly skip tuples on recovery
memtx: throw an instance of ClientError to correctly skip tuples on recovery

In panic_on_wal_error=true mode, we only skip ClientError errors,
but not SystemError errors. An error to allocate a tuple is
a recoverable error, so use ClientError for it. This way,
at recovery, tuples which can't be allocated are skipped.

KlonD90/tarantool,KlonD90/tarantool,vasilenkomike/tarantool,guard163/tarantool,Sannis/tarantool,rtsisyk/tarantool,Sannis/tarantool,vasilenkomike/tarantool,KlonD90/tarantool,guard163/tarantool,mejedi/tarantool,vasilenkomike/tarantool,ocelot-inc/tarantool,dkorolev/tarantool,dkorolev/tarantool,dkorolev/tarantool,ocelot-inc/tarantool,rtsisyk/tarantool,ocelot-inc/tarantool,condor-the-bird/tarantool,vasilenkomike/tarantool,ocelot-inc/tarantool,dkorolev/tarantool,rtsisyk/tarantool,Sannis/tarantool,guard163/tarantool,dkorolev/tarantool,condor-the-bird/tarantool,Sannis/tarantool,condor-the-bird/tarantool,mejedi/tarantool,condor-the-bird/tarantool,condor-the-bird/tarantool,Sannis/tarantool,rtsisyk/tarantool,KlonD90/tarantool,vasilenkomike/tarantool,guard163/tarantool,mejedi/tarantool,mejedi/tarantool,guard163/tarantool,KlonD90/tarantool