Storage Provider no longer in Global Scope

[HexaField]

Summary

The storage provider is being created in global scope, which makes it hard to override in tests. This also allows us to have better clarity over which storage provider will be in use when we move to support multiple storage providers.

References

closes #insert number here

Checklist

• CI/CD checks pass npm run check
  • Linter passing via npm run lint
  • Typescript passing via npm run check-errors
  • Unit & Integration tests passing via npm run test
  • Docker build process passing via npm run build-client
• If this PR is still a WIP, convert to a draft
• When this PR is ready, mark it as "Ready for review"
• Changes have been manually QA'd
• Changes reviewed by at least 2 approved reviewers

QA Steps

List any additional steps required to QA the changes of this PR, as well as any supplemental images or videos.

Reviewers

Reviewers for this PR