v.25.7Bug Fix (user-visible misbehavior in an official stable release)

Fix deserialization of groupArraySample/groupArrayLast

Official CH changelog text
Fix deserialization of groupArraySample/groupArrayLast in case of empty elements (deserialization could skip part of the binary if the input was empty, this can lead to corruption during data read and UNKNOWN_PACKET_FROM_SERVER in TCP protocol). This does not affect numbers and date time types. #82763 (Pedro Ferreira).
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