[services] Dev mode - Add terraform

Summary:
Depends on D3692

Adding terraform configurations for the S3 and Dynamo DB.

Test Plan:

cd services/terraform
./run.sh

Reviewers: palys-swm, jimpo, ashoat

Reviewed By: palys-swm, jimpo, ashoat

Subscribers: ashoat, palys-swm, Adrian, atul, benschac, yayabosh

Differential Revision: https://phabricator.ashoat.com/D3693