[FLINK-37332] Support any column as chunk key column (postgres, orcale, db2, sqlserver)

[SML0127]

MySQL CDC connector supports this feature from flink cdc v3.2
Now, other connectors that support incremental snapshot allow any columns as chunk key column

apache jira: https://issues.apache.org/jira/browse/FLINK-37332

[gtk96]

I suggest separating the pull requests for code and documentation to avoid the term 'snapshot' appearing in the documents. The pull request for the documentation can be merged after the release of version 3.4.

[SML0127]

I suggest separating the pull requests for code and documentation to avoid the term 'snapshot' appearing in the documents. The pull request for the documentation can be merged after the release of version 3.4.

Hi, @gtk96
I seperated pr for docs (#3924)

[gtk96]

cc @lvyanquan

[SML0127]

cc @lvyanquan

I recently changed my laptop and some environment seems to have become a bit messed up..🥲
I'll make a new PR.