use wildcard redirect for 2020th report
This change adds a wildcard redirect for all annual reports from 2020 to 2029. Furthermore the default redirect is mapped to a custom-managed redirect by communications team. With this configuration no changes are needed for future annual reports.
Tested locally following the docs at https://httpd.apache.org/docs/2.4/rewrite/remapping.html#movehomedirs
Similar to https://gerrit.wikimedia.org/r/q/I68796cf1357e2d05c3ae0e41a109e8c9686530c1
Bug: T336217