fix: pin cloud-init for ubuntu 22.04 image

This pins the cloud-init version in the CAPA AMI for ubuntu 22.04 to
an older version. This is required as newer versions of cloud-init
don't work with the way CAPA gets the user-data onto the instance.

This is a temporary solution until a more long term solution is found.

Signed-off-by: Richard Case <richard.case@outlook.com>

images/capi/packer/ami/ubuntu-2204.json

@@ -1,6 +1,7 @@
 {
   "ami_filter_name": "ubuntu/images/*ubuntu-jammy-22.04-amd64-server-*",
   "ami_filter_owners": "099720109477",
+  "ansible_extra_vars": "pinned_debs=\"cloud-init=23.1.2-0ubuntu0~22.04.1\"",
   "build_name": "ubuntu-22.04",
   "distribution": "Ubuntu",
   "distribution_release": "jammy",