[terraform] remove usage of s3 bucket for terraform config

Summary:
After discussing with Ashoat, we initially don't want to set up with an S3 bucket storing terraform state.

Depends on D12322

Test Plan: terraform apply was successful after a reinit of terraform

Reviewers: ashoat, varun, bartek

Reviewed By: bartek

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D12323