Datamart: support multiple refresh policy/schedule for tables in a datamart

[samnseir]

Could we define a several refresh schedule policies/profiles and then apply to these to the tables in a datamart.

This would allow some tables to refresh more frequently, and other less, and others even no refresh.

[richard_baldwin]

To add to this an API for each refresh schedule/policy so they can be manually called.

[jsh121988]

We absolutely need this. Having all tables refresh at the same time causes a massive hit to our source databases. I also want to control this using an API so I can track which tables failed refresh. This would also make it so the whole pipeline doesn't fail if only 1 table fails.