ClickHouse Security Fixes and Format Parsing Corrections

Several fixes for format parsing. This is relevant if clickhouse-server is open for write access to adversary. Specifically crafted input data for Native format may lead to reading uninitialized memory or crash. This is relevant if clickhouse-server is open for write access to adversary. #33050 (Heena Bansal). Fixed Apache Avro Union type index out of boundary issue in Apache Avro binary format. #33022 (Harry Lee). Fix null pointer dereference in LowCardinality data when deserializing LowCardinality data in the Native format. #33021 (Harry Lee).