[Fix] Flink connector support json import and use httpclient to streamlaod

[JNSimba]

Proposed changes

When the text is imported, there may be separators in the data;
Therefore, support json format import.
Need setting parameters (only json array format is provided, so it must be set in pairs)
sink.properties.format = json
sink.properties.strip_outer_array=true

And modify the HTTPURLConnection of streamload to Httpclient request

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• I have created an issue on (Fix doris-flink-connecter数据换行配置不起作用 #6550 ) and described the bug/feature there in detail
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Further comments

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[hf200012]

The http client version should be upgraded to 4.5.13

[hf200012]

LGTM

[github-actions]

PR approved by anyone and no changes requested.

[minchowang]

Thanks @JNSimba for the nice contribution.

[morningman]

Hi @JNSimba Maybe we can add this to the

docs/zh-CN/extending-doris/flink-doris-connector.md

?

Add a simple instruction for this featuer?

[JNSimba]

Hi @JNSimba Maybe we can add this to the

docs/zh-CN/extending-doris/flink-doris-connector.md

?

Add a simple instruction for this featuer?

already add

[hf200012]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.