support load data from starrocks table by specific condition

[billowsoft]

starrocks-connector-for-apache-flink/src/main/java/com/starrocks/connector/flink/table/source/StarRocksDynamicLookupFunction.java

Line 99 in 08de67a

StringBuilder sqlSb = new StringBuilder("select * from ");

Current implementation is loading all the data of the table which will cause OOM while the the data volume is too big, suggest can support load data by specific condition, just like org.apache.flink.connector.jdbc.table.JdbcLookupFunction

[jaogoy]

@billowsoft You mean it's no way to specify the condition?
cc @banmoy