Merge ~lool/ubuntu-images/+git/ubuntu-images:arm64-server into ubuntu-images:lunar

[Loïc Minier]

Add Ubuntu Server arm64 definition to help with ubuntu-image 3.x development

This depends on adding the classic-arm64 branch to the PC gadget repo using this branch:
https://github.com/lool/pc-gadget/tree/classic-arm64

[Łukasz Zemczak (sil2100)]

I'll merge this as-is but then modify the gadget url after it lands.

review: Approve

[Loïc Minier (lool)]

Ah right, I intended to send the branch with the target gadget URL, but it's even better if you just fix it when merging

- # FIXME temporary using the common mirror
- url: "https://github.com/lool/pc-gadget"
+ url: "https://git.launchpad.net/~canonical-foundations/snap-pc/+git/github-mirror-amd64"

9bc91fa... by Loïc Minier on 2023-05-24

Point to pc-gadget mirror

Branch has landed on github and has been mirrored by Launchpad

[Łukasz Zemczak (sil2100)]

This was merged but to the mantic images.

diff --git a/ubuntu-server-pc-arm64.yaml b/ubuntu-server-pc-arm64.yaml
new file mode 100644
index 0000000..bdfecc0
--- /dev/null
+++ b/ubuntu-server-pc-arm64.yaml
@@ -0,0 +1,51 @@
+name: ubuntu-server-arm64
+display-name: Ubuntu Server arm64
+revision: 1
+architecture: arm64
+series: lunar
+class: preinstalled
+kernel: linux-image-generic
+gadget:
+  url: "https://git.launchpad.net/~canonical-foundations/snap-pc/+git/github-mirror-amd64"
+  branch: classic-arm64
+  type: "git"
+rootfs:
+  mirror: "http://ports.ubuntu.com/ubuntu-ports/"
+  pocket: updates
+  components:
+    - main
+    - restricted
+  seed:
+    urls:
+      - "git://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/"
+    branch: lunar
+    names:
+      - server
+      - minimal
+      - standard
+      - cloud-image
+customization:
+  cloud-init:
+    user-data: |
+      chpasswd:
+        expire: true
+        users:
+          - name: ubuntu
+            password: ubuntu
+            type: text
+  extra-snaps:
+    - name: snapd
+  extra-packages:
+    # FIXME using extra-packages as a workaround for missing bits to make the
+    # system bootable that should be pulled by seeds or metapackages
+    # signed EFI boot chain
+    - name: grub-efi-arm64-signed
+    - name: shim-signed
+    # for update-grub
+    - name: grub2-common
+artifacts:
+  img:
+    -
+      name: ubuntu-23.04-preinstalled-server-arm64.img
+  manifest:
+    name: "filesystem-manifest.txt"