[Improve][chunjun-connector-clickhouse] Added support for map<string, unit>data types

[fengjian1129]

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Description

Added support for the following map data types, converting map to JsonString for data synchronization
Map<string,uint8> Map<string,uint16>, Map<string,uint32> , Map<string,int8> ,Map<string,int16>,Map<string,int32>
for example: clickhouse-source data type is map --> xxx-sink data type is string or varchar

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