Revert "XWIKI-8595: Use the new localization module to register translations for the Workspaces application"

This reverts commit e0839bee428d76c9968185adfb3c3ff22100da58.

The 4.5.2 release is too close and this issue is not a blocker. Also, the commit was incomplete, since it needed 2 other commits from master, corresponding to this issue.