add json validator on workspaces_agent_config_versions table

MR: Pending

Description

Based on discussion here, we would like to create jsonb schema validation on the model for both object and object_changed.

The validation should be simple, and just very high level.

And then we could remove both columns from the ignored_column in test case.

Acceptance Criteria

• have the jsonb validation method for both columns
• remove both columns from the ignored_column

Technical Requirements

NA

Design Requirements

NA

Impact Assessment

NA

User Story

NA