[Improve]Added direct access to BE through the intranet

[DongLiang-0]

Proposed changes

When the flink connector accesses DORIS, it parses out all surviving BE nodes according to the FE address filled in.

However, when the BE node is deployed, most of the internal network IP is filled in,so the BE node parsed by FE is the internal network IP. When flink is deployed on a non-intranet segment,the BE node will be inaccessible on the network.

In this pr, you can access the BE node on the intranet by directly configuring DorisOptions.builder().setBenodes().build()
, after you configure this parameter, Flink Connector will not parse all BE nodes through FE nodes.

Problem Summary:

Describe the overview of changes.

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[JNSimba]

By the way, add the options of flink table, thanks

[JNSimba]

By the way, add the options of flink table, thanks

and please also add options in databasesync , thanks

[DongLiang-0]

By the way, add the options of flink table, thanks

and please also add options in databasesync , thanks

Thanks for your suggestion, I have supported.

[JNSimba]

LGTM