[DQaC] Simplified Test Runner API

[edg956]

As a data engineer
I want a simple Python API to define and run OpenMetadata data quality tests on my datasets
So that I can integrate data quality checks directly into my ETL or ELT code without manually interacting with the OpenMetadata APIs.

Acceptance Criteria

• I can initialize a TestRunner for a service or table.
• I can add one or more test cases using simple Python objects or functions.
• I can run the tests and receive structured results in code.
• The API uses existing OpenMetadata test definitions where possible.

Example API

from metadata.sdk.data_quality import TableColumnCountToBeBetween, TestRunner

runner = TestRunner.for_service("MySQL.default.openmetadata_db.bot_entity")
runner.add_test(TableColumnCountToBeBetween(min_count=10))

results = runner.run_and_handle()