feat: support table/column lineage for mysql backend

[xuan616]

Summary of Changes

The change is related to issue #2072. It is about supporting table/column lineage for mysql backend end to end.

• databuilder: updated table_lineage model for table/column lineage record iterator and the corresponding sample_data_loader_mysql.py
• metadata_service: updated mysql_proxy.py to add lineage related endpoint.

Tests

Added unit tests in both databuilder and metadata_service for lineage related change.

Documentation

N/A

CheckList

Make sure you have checked all steps below to ensure a timely review.

• [X] PR title addresses the issue accurately and concisely. Example: "Updates the version of Flask to v1.0.2"
  • In case you are adding a dependency, check if the license complies with the ASF 3rd Party License Policy.
• [X] PR includes a summary of changes.
• [X] PR adds unit tests, updates existing unit tests, OR documents why no test additions or modifications are needed.
• [X] In case of new functionality, my PR adds documentation that describes how to use it.
  • All the public functions and the classes in the PR contain docstrings that explain what it does

[feng-tao]

thanks @xuan616