[CI] Use Docker Compose v2 in GH Actions

Summary:
Fixes ENG-7634.
Docker compose v1 (docker-compose) is deprecated in favor of docker compose subcommand.

Test Plan: This pull request: https://github.com/CommE2E/comm/pull/311/files

Reviewers: atul, kamil

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D11543