templates: armv7l: directly load kernel and initrd

EFISTUB doesn't seem to work with qemu-system-arm, so the kernel and the
initrd have to be directly passed to QEMU.

Workaround for issue 1701

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

examples/experimental/armv7l.yaml

@@ -1,20 +1,24 @@
-# This example requires Lima v0.7.0 or later.
+# This example requires Lima v0.17.0 or later.
 
 arch: "armv7l"
+cpus: 1
+memory: "2GiB"
 images:
-# Try to use release-yyyyMMdd image if available. Note that release-yyyyMMdd will be removed after several months.
-- location: "https://cloud-images.ubuntu.com/releases/23.04/release-20230729/ubuntu-23.04-server-cloudimg-armhf.img"
-  arch: "armv7l"
-  digest: "sha256:ab0a4f4e9538694f6edc0e2f8bc18923ec364333dd2883377949d99e2f4788c6"
-# Fallback to the latest release image.
-# Hint: run `limactl prune` to invalidate the cache
+# EFISTUB seems to be broken for qemu-system-arm, so kernel and initrd have to be directly passed to QEMU.
+# https://github.com/lima-vm/lima/issues/1701
 - location: "https://cloud-images.ubuntu.com/releases/23.04/release/ubuntu-23.04-server-cloudimg-armhf.img"
   arch: "armv7l"
+  kernel:
+    location: "https://cloud-images.ubuntu.com/releases/23.04/release/unpacked/ubuntu-23.04-server-cloudimg-armhf-vmlinuz-lpae"
+    cmdline: "root=LABEL=cloudimg-rootfs ro"
+  initrd:
+    location: "https://cloud-images.ubuntu.com/releases/23.04/release/unpacked/ubuntu-23.04-server-cloudimg-armhf-initrd-generic-lpae"
 
 mounts:
 - location: "~"
 - location: "/tmp/lima"
   writable: true
+mountType: "9p"
 
 # We do not have arm-v7 binaries of containerd
 containerd: