[docker-compose] Update deprecated localstack config

Summary:
Details in ENG-5677.
Some of the config environment variables for Localstack are deprecated.
I've updated them according to the docs.

Depends on D9740

Test Plan:

• Run localstack locally and use it (e.g. integration tests)
• Stop and restart localstack container, check if the data is still there (DDB and S3 items)
• Run this on CI

Reviewers: kamil, michal, atul

Reviewed By: atul

Subscribers: ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9742