[Improve][SDK] Optimize the implementation of the Utils.java class

[gosonzhang]

Description

Optimize the implementation of the Utils.java class:

1. The two functions isNotBlank() and isBlank() have been defined in StringUtils and do not need to be defined again;

2. This class is mainly an implementation function related to IP, and the class name should be renamed to facilitate the alignment of the class usage

3. https://github.com/apache/inlong/blob/master/inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/network/Utils.java

InLong Component

InLong SDK

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• Yes, I am willing to submit a PR!

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