Allow choosing activestorage configuration from settings.yml

[cjcolvar]

Currently the activestorage adapter is hard coded in the matching environment file (e.g. config/environments/development.yml). This leads to problems when deploying to spruce since it isn't setup to use minio which is the default so developers can use docker.

Done Looks Like

• Config file is decided
• Application updated to use config

[joncameron]

On Spruce we can do development.local as an override.

[phuongdh]

Tested working on Spruce