arch_backup major fixes

1. Don't automount disks (dconf changes) this breaks backups
2. Rewrite the entire backup script to handle mounting, decrypting,
   many use cases, etc
3. Update main.yaml to not create mount location for backup drive,
   script will handle it

ansible/arch_backup/tasks/main.yml

@@ -5,28 +5,6 @@
     state: directory
     path: "{{ snapshots.path }}"
   become: yes
-- name: Ensure backup mount directory
-  file:
-    state: directory
-    path: "{{ mount.path }}"
-  become: yes
-- name: Ensure {{ mount.path }} device exists in crypttab
-  community.general.crypttab:
-    name: "{{ disk.name }}"
-    backing_device: "UUID={{ disk.uuid }}"
-    password: "{{ disk.password }}"
-    opts: luks
-    state: present
-  become: yes
-  no_log: true
-- name: Ensure {{ disk.name }} mount exists in fstab
-  ansible.posix.mount:
-    path: "{{ mount.path }}"
-    src: /dev/mapper/{{ disk.name }}
-    fstype: btrfs
-    opts: nofail,x-systemd.device-timeout=1,noatime,compress=zstd
-    state: present
-  become: yes
 - name: Ensure /usr/local/scripts exists
   file:
     state: directory