[services] Change 'run.sh' to 'terraform-init.sh' and add terraform file exist checks

Summary: This renames the run script in remote to terraform-init, removes the terraform apply, and just prepares the environment for further terraform commands.

Test Plan: Ran the scripts. Working properly

Reviewers: bartek, varun

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10702