Retire EAL Proxy Pass Rules at library.princeton.edu/eastasian path

[x] #5148
[x] Update NGINX config for the staging domain to proxy pass back to all the sites on eal-apps-staging.princeton.edu.
[x] Test proxy pass rules on staging
[x] All current proxy pass rules for library-staging.princeton.edu/eastasian back to the eal-apps-staging domain should be converted to global redirect rules to the same path on eal-staging.lib.princeton.edu. Test new redirect rules.
[x] Ask Tom V. to test the staging site.
[x] Update NGINX config for the new production domain to proxy pass back to all the sites on eal-apps-prod.princeton.edu.
[x] Test proxy pass rules on production
[x] All current proxy pass rules for library.princeton.edu/eastasian back to the eal-apps-prod domain should be converted to global redirect rules to the same path on lib-static-prod. Test new redirect rules.

pulibrary / princeton_ansible