Apply local configuration when deploying an existing instance

[patchwork01]

Background

Split from:

• Deploy a Sleeper instance with no tables via scripts #3513

Depends on:

• Replace AddTable with PutTable #3627

Description

To align with the changes in the linked issue, we can add an option to the deploy existing instance script to apply a set of local configuration when deploying an existing instance. We can add the instance properties file as an optional argument to the script.

Analysis

To apply the locally held table configuration, we'll need to be able to apply it declaratively, as in #3627.

For the instance properties, we can re-apply PopulateInstanceProperties on the local configuration, but use the existing instance properties to supply the parameters for it rather than taking them from the command line or AWS clients.