[Bug][Manager] Fix parse Json exception in manager client

[kipshi]

What happened

When use manager client to invoke inlong group, some mistakes of json_parsing happens;

What you expected to happen

No exception happens when parse json;

How to reproduce

InlongGroup group = inlongClient.forGroup(groupConf);
InlongStreamConf streamConf = createStreamConf();
InlongStreamBuilder streamBuilder = group.createStream(streamConf);
streamBuilder.sink(createHiveSink());
streamBuilder.fields(createStreamFields());
streamBuilder.source(createMysqlSource());
streamBuilder.initOrUpdate();
// 真正的启动
InlongGroupContext groupInfo = group.init();
System.out.println(groupInfo);

Environment

No response

InLong version

master

InLong Component

InLong Manager

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct