[EPIC] Tag for data classification

[shaofengshi]

Describe the proposal

As we know, data tagging and classification entail the process of labeling and categorizing data based on its sensitivity, importance, or compliance requirements. This is done to facilitate better data management, access control, and protection.

As a unified metadata management platform, Gravitino need to have the capability to allow user to create tag, assign tag to an data asset, and leverage the tags to do data discovery, filtering, etc.

Task list

• [x] #3460
• [ ] Metadata structure design and implementation for Tag system (KV storage layout).
• [ ] #3495
• [x] #3895
• [ ] #3914
• [ ] Java client implementation for Tag system.
• [ ] Python client implementation for Tag system.
• [ ] Add privileges support for Tag system.
• [ ] Add event listener support for Tag system.
• [ ] #3351

[jerryshao]

I'm going to work on this.

[jerryshao]

Here is the design doc for Tag system (https://docs.google.com/document/d/1zkQWla8OMIPY61HqKUivpf43cTteNvcd2w_oA32yAfg/edit?usp=sharing).