Introduce SM specific models for microsoft applciations

What does this MR do and why?

This merge request introduces two new tables system_access_instance_microsoft_applications and system_access_instance_microsoft_graph_access_tokens . These tables are to store instance specific data from system_access_microsoft_applications and system_access_microsoft_graph_access_tokens respectively.

Int the current database we set namespace_id as null to represent instance wide settings for microsoft applications. We are spliiting the table to facilitate tables to sharded per organization.

Related to #491021 (closed)