[Refactor] Unify JSONUtils class into kun-commons-utils module

[JoshOY]

Is your feature request related to a problem? Please describe.
Currently, we have 4 different implementations of JSON utility class:

1. com.miotech.kun.commons.query.utils.JSONUtils (under kun-commons:kun-commons-query module)
2. com.miotech.kun.common.utils.JSONUtils (under kun-app-common module)
3. com.miotech.kun.metadata.databuilder.utils.JSONUtils (under kun-metadata:kun-metadata-databuilder module)
4. com.miotech.kun.workflow.utils.JSONUtils (under kun-workflow:kun-workflow-utils module)

It is a huge mess to use different utility classes on the same aspect of functionality, and even not with a unified implementation on underlying libraries (for example, com.miotech.kun.workflow.utils.JSONUtils uses Jackson, and com.miotech.kun.common.utils.JSONUtils uses GSON.

Describe the solution you'd like
Unify all JSON handling functionalities into one single util class: com.miotech.kun.common.utils.JSONUtils. Use Jackson as the underlying library.