[Improve][DataProxy] Use the defined message attribute key value in InLong-Common

[gosonzhang]

Description

When dealing with pr[1], I found that DataProxy separately defines the property Key value for message interaction between SDK and DataProxy. This information should be placed in InLong-Common, so that when dealing with cross-module content, the same Key It can avoid repeated definitions, or the problem that the key value is defined incorrectly and the corresponding value cannot be obtained.

1. [INLONG-6329][DataProxy] Add proxy-send mode message logic #6351

InLong Component

InLong DataProxy

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

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[gosonzhang]

I made the following changes in the PR (#6386) :

1. Change all message attribute Keys generated by SDK and used by DataProxy or other modules to be obtained from org.apache.inlong.common.msg.AttributeConstants;
2. The message attribute Key generated by DataProxy and returned to the receiver through the message attribute is placed in the org.apache.inlong.common.msg.AttributeConstants file, and the generation direction is marked;
3. Change the file name of org.apache.inlong.dataproxy.consts.AttributeConstants to org.apache.inlong.dataproxy.consts.AttrConstants to avoid confusing references with the same name as org.apache.inlong.common.msg.AttributeConstants