Add #cloud-config header to all overlay files

because `kairos-agent config` command ignores those files because of the
missing header. That command is supposed to print all the config that is
taken into account from kairos-agent and immucore and all.

Currently it ignore those files the same way it ignores them when
running `kairos-agent manual-install` et al. Adding the header will make
the kairos-agent respect those files, essentially with no effect since
none of these files set any installation options.
The only useful result will be that `kairos-agent config` will print the
full config making it easier for the user to see the full merged yaml
that results from all the available config files.

Signed-off-by: Dimitris Karakasilis <dimitris@karakasilis.me>

packages/static/kairos-overlay-files/files/system/oem/00_datasource.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Datasource handling"
 stages:
   rootfs.before:

packages/static/kairos-overlay-files/files/system/oem/00_home_dir_owner_fix.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Fix home directory permissions (kairos issue #2797)"
 stages:
   network.after:

packages/static/kairos-overlay-files/files/system/oem/00_rootfs.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 # Rootfs Kairos OEM configuration file
 #
 # This file is part of Kairos and will get reset during upgrades.

packages/static/kairos-overlay-files/files/system/oem/00_rootfs_uki.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 # Rootfs Kairos OEM configuration file
 #
 # This file is part of Kairos and will get reset during upgrades.
@@ -58,4 +60,4 @@ stages:
       environment_file: /run/cos/cos-layout.env
       environment:
         RW_PATHS: "/var /etc /srv /home"
-        OVERLAY: "tmpfs:25%"
+        OVERLAY: "tmpfs:25%"

packages/static/kairos-overlay-files/files/system/oem/02_agent.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Start agent"
 stages:
   boot:

packages/static/kairos-overlay-files/files/system/oem/02_notify.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Notify Kairos Plugins of Elemental Events"
 stages:
     initramfs:

packages/static/kairos-overlay-files/files/system/oem/03-setupcon.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Fonts fix for ubuntu"
 stages:
   initramfs.after:

packages/static/kairos-overlay-files/files/system/oem/05_network.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Default network configuration"
 stages:
   rootfs.before:

packages/static/kairos-overlay-files/files/system/oem/08_grub.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 # Rootfs Kairos OEM configuration file
 #
 # This file is part of Kairos and will get reset during upgrades.

packages/static/kairos-overlay-files/files/system/oem/09_openrc_services.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Create openrc services"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/09_systemd_services.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 # Rootfs Kairos OEM configuration file
 #
 # This file is part of Kairos and will get reset during upgrades.

packages/static/kairos-overlay-files/files/system/oem/10_accounting.yaml

@@ -1,3 +1,5 @@
+# cloud-config
+
 name: "Default user, permissions and serial login"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/11_RPI.yaml

@@ -1,4 +1,5 @@
 #cloud-config
+
 name: "RPI configs"
 stages:
   initramfs.before:

packages/static/kairos-overlay-files/files/system/oem/12_nvidia.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Nvidia jetson specific files"
 stages:
     initramfs:

packages/static/kairos-overlay-files/files/system/oem/21_kcrypt.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Kcrypt"
 stages:
   after-upgrade:

packages/static/kairos-overlay-files/files/system/oem/23_c3os.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "c3os sentinel migration"
 stages:
   fs.after:

packages/static/kairos-overlay-files/files/system/oem/25_autologin.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Root autologin"
 stages:
   initramfs:
@@ -34,4 +36,4 @@ stages:
         - sed -i -e 's/tty1.*//g' /etc/inittab
         - sed -i -e 's/ttyS0.*//g' /etc/inittab
         - echo "tty1::respawn:/sbin/agetty --autologin root -i --noclear tty1" >> /etc/inittab
-        - echo "ttyS0::respawn:/sbin/agetty --autologin root -i --noclear ttyS0" >> /etc/inittab
+        - echo "ttyS0::respawn:/sbin/agetty --autologin root -i --noclear ttyS0" >> /etc/inittab

packages/static/kairos-overlay-files/files/system/oem/26_selinux.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "SELinux"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/26_vm.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Enable QEMU tools"
 stages:
   boot:

packages/static/kairos-overlay-files/files/system/oem/29_blacklist.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 stages:
   initramfs.before:
     - name: "Blacklist bpfilter on Alpine ( bug: https://github.com/kairos-io/kairos/issues/277 )"

packages/static/kairos-overlay-files/files/system/oem/30_ulimit.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 stages:
   boot.before:
     - name: "Setup higher limit for open files"

packages/static/kairos-overlay-files/files/system/oem/31_hosts.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 stages:
   initramfs.before:
     # For debian based distributions, /etc/hosts is present but empty. This is because the file

packages/static/kairos-overlay-files/files/system/oem/32_profile.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Profile extensions"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/50_recovery.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Start recovery on tty1"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/51_reset.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Start reset on tty1"
 stages:
   initramfs:

packages/static/kairos-overlay-files/files/system/oem/52_installer.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "Start installer on tty1"
 stages:
   initramfs:
@@ -56,4 +58,4 @@ stages:
         ([ -f /run/cos/live_mode ] || [ -f /run/cos/uki_install_mode ]) && \
         ( [ -e "/sbin/systemctl" ] || [ -e "/usr/bin/systemctl" ] || [ -e "/usr/sbin/systemctl" ] || [ -e "/usr/bin/systemctl" ] )
       commands:
-        - systemctl start kairos-webui
+        - systemctl start kairos-webui

packages/static/kairos-overlay-files/files/system/oem/99_sysext.yaml

@@ -1,3 +1,5 @@
+#cloud-config
+
 name: "sysext"
 stages:
   fs.after: