Set ami_groups = "" so AMI are not public

Author: sl1pm4t

images/capi/packer/ami/flatcar-arm64.json

@@ -2,6 +2,7 @@
   "ami_filter_arch": "arm64",
   "ami_filter_name": "Flatcar*{{env `FLATCAR_CHANNEL`}}*{{env `FLATCAR_VERSION`}}*",
   "ami_filter_owners": "075585003325",
+  "ami_groups": "",
   "ansible_extra_vars": "ansible_python_interpreter=/opt/bin/python",
   "arch": "arm64",
   "build_name": "flatcar-{{env `FLATCAR_CHANNEL`}}",
@@ -17,6 +18,7 @@
   "kubernetes_source_type": "http",
   "python_path": "/opt/bin/builder-env/site-packages",
   "root_device_name": "/dev/xvda",
+  "snapshot_groups": "",
   "ssh_username": "core",
   "systemd_prefix": "/etc/systemd",
   "sysusr_prefix": "/opt",

images/capi/packer/ami/flatcar.json

@@ -2,6 +2,7 @@
   "ami_filter_arch": "x86_64",
   "ami_filter_name": "Flatcar*{{env `FLATCAR_CHANNEL`}}*{{env `FLATCAR_VERSION`}}*",
   "ami_filter_owners": "075585003325",
+  "ami_groups": "",
   "ami_regions": "eu-west-3,eu-west-2,eu-west-1,ca-central-1,eu-central-1,us-east-1,us-east-2,us-west-1,us-west-2,ap-southeast-2",
   "ansible_extra_vars": "ansible_python_interpreter=/opt/bin/python",
   "arch": "amd64",
@@ -13,6 +14,7 @@
   "compliance_playbook": "./ansible/playbooks/noop.yml",
   "python_path": "/opt/bin/builder-env/site-packages",
   "root_device_name": "/dev/xvda",
+  "snapshot_groups": "",
   "ssh_username": "core",
   "systemd_prefix": "/etc/systemd",
   "sysusr_prefix": "/opt",