refactor(standardize): fix sudoers lecture syntax, extract ssh config, remove redundant os filters

roles/partitioning/defaults/main.yml

@@ -10,12 +10,12 @@ partitioning_use_full_disk: true
 partitioning_separate_boot: >-
   {{
     (system_cfg.luks.enabled | bool)
-    and (os | lower not in ['archlinux'])
+    and (os not in ['archlinux'])
   }}
 partitioning_boot_fs_fstype: >-
   {{
-    (system_cfg.filesystem | lower)
-    if (system_cfg.filesystem | lower) != 'btrfs'
+    system_cfg.filesystem
+    if system_cfg.filesystem != 'btrfs'
     else ('xfs' if is_rhel else 'ext4')
   }}
 partitioning_boot_fs_partition_suffix: >-