Description:

When we switch galaxy.ansible.com to point to the unified codebase site, keep the old site available under a different hostname like old-galaxy.ansible.com

Also we should keep beta-galaxy.ansible.com pointing at the new site to maintain compatibility and deprecate / remove later.

Proposed Solution:

• add galaxy[-env].ansible.com routes, while also keeping the beta-galaxy[-env].ansible.com routes on the galaxy-ng deployments.
• modify the routes on the old galaxy deployment to old-galaxy[-env].ansible.com.
• add a 307 redirect in nginx for galaxy-ng from beta-galaxy.ansible.com to galaxy.ansible.com.
• update PULP_CONTENT_ORIGIN envvar for galaxy-ng to new URLs.
• update oauth apps with new URLs (for both old and new sites).
• update monitoring dashboards with new URLs (for both old and new sites).
• update lightspeed docs to remove "beta" from galaxy_ng URL.