Create Custom Tables with YML Files

[spficklin]

Task Description

Currently, when we add custom tables, they are hard-coded in the prepare step, and if a module developer wants to create a custom table they have to write a function to setup the array and call the service to create it. Instead, do we want to have a YML file that defines custom tables and those get added automatically when the extension module is installed?

Branch Name

tv4g[0-9]-issue\d+-[optional short descriptor]

[spficklin]

One benefit for this is that we can drop the tripal_custom_tables table as the information about the custom tables/mviews stays in the configuration.