feat: use s3 storage for static files

Description

Add a new setting, GROVE_ENABLE_S3_STATIC_FILES. If enabled, then static files for the LMS and CMS (not MFE's) will be served from the configured static bucket.

Supporting information

• https://tasks.opencraft.com/browse/BB-7446

Testing instructions

Steps to test the changes:

Visit:

• Verify that the static assets are loaded from a DO Spaces bucket for the URLs:

  • https://es1.kgdocluster.opencraft.hosting
  • https://studio.es1.kgdocluster.opencraft.hosting
  • Enable/disable this setting at will
  • The repo for these instances can be found at https://gitlab.com/opencraft/devstacks/keith/grove-do

• Verify that the static assets are loaded from a AWS S3 bucket for the URLs:

  • https://lms.keith-grove-test.stage.opencraft.hosting
  • https://studio.keith-grove-test.stage.opencraft.hosting
  • Enable/disable this setting at will
  • The repo for these instances can be found at https://gitlab.com/opencraft/devstacks/keith/grove-aws

Checklist

If any of the items below is not applicable, do not remove them, but put a check in it.

• All providers include the new feature/change
• All affected providers can provision new clusters
• Unit tests are added/updated
• Documentation is added/updated
• The TOOLS_CONTAINER_IMAGE_VERSION in ci_vars.yml is updated
• The grove-template repository is updated