r/gitea: Handle encoded / characters in HTTP paths

Gitea package names (e.g. OCI images, etc.) can contain `/` charactres.
These are encoded as %2F in request paths.  Apache needs to forward
these sequences to the Gitea server without decoding them.
Unfortunately, the `AllowEncodedSlashes` setting, which controls this
behavior, is a per-virtualhost setting that is *not* inherited from the
main server configuration, and therefore must be explicitly set inside
the `VirtualHost` block.  This means Gitea needs its own virtual host
definition, and cannot rely on the default virtual host.

roles/gitea/defaults/main.yml

@@ -11,3 +11,8 @@ gitea_http_domain: '{{ gitea_ssh_domain }}'
 gitea_root_url: 'http://{{ gitea_http_domain }}:3000/'
 gitea_webhook_allowed_host_list:
 - '*'
+
+gitea_ssl_certificate: >-
+  {{ apache_ssl_certificate }}
+gitea_ssl_certificate_key: >-
+  {{ apache_ssl_certificate_key }}