Add limits_history to PlanLimits

What does this MR do and why?

#1 MR relates to: https://gitlab.com/gitlab-org/gitlab/-/issues/395530

In this MR (Solution B):

We are Introducing limits_history column to the plan_limits table

This will allow us to:

• Track the changes that happen to enforcement_limit, notification_limit, storage_size_limit, dashboard_limit_enabled_at columns.
• Build the logic needed to have this design in later steps.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.