fix remaining packages to new format

- still needs testing

tasks/config/rust.yml

@@ -1,3 +1,6 @@
 # vim: set filetype=yaml.ansible :
 ---
-rustup_managed: false
+- name: Set rust config
+  ansible.builtin.set_fact:
+    rust:
+      pkgs: "{{ pkgconfig.rust.pkgs[ansible_system] }}"