feat(map): update to v4 “map.jinja”

The `map.jinja` now exports a single variable called `mapdata`.

We extract the `openssh`, `sshd_config` and `ssh_config` from it to
minimize the changes to `.sls` files.

openssh/auth_map.sls

@@ -1,7 +1,9 @@
 include:
   - openssh
 
-{%  from "openssh/map.jinja" import openssh, sshd_config with context -%}
+{%  from "openssh/map.jinja" import mapdata with context -%}
+{%- set openssh = mapdata.openssh %}
+{%- set sshd_config = mapdata.sshd_config %}
 {%- set authorized_keys_file = sshd_config.get("AuthorizedKeysFile", None) %}
 
 {%- for store, config in openssh.get("auth_map", {}).items() %}