feat(local dev): multi-region blob storage

[iainsproat]

Description & motivation

Adds a second MinIO to the local development docker-compose file.
This simulates a second blob storage region.
Updates the multiregion.json configuration files to provide the details of this MinIO deployment.

Changes:

To-do before merge:

Screenshots:

Validation of changes:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References