[services] Downgrade aws provider to 4.67.0 on local dev

Summary:
Opensearch service apply/modify/destroy have delays starting from version 5.0.0 of the aws provider. This diff downgrades our local dev environment to version 4.67.0, removing these delays.

https://linear.app/comm/issue/ENG-6393/investigate-reducing-opensearch-local-and-ci-deployment-times#comment-3a151b96

Test Plan: Successful terraform apply on local dev environment

Reviewers: bartek, varun

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10607