[buildomat] Package all global zone tarballs into single tarball (#2475)

My expectation is that we'll:

1. Download `global-zone-packages.tar.gz` in the `helios` repo
2. Unpack the contents into a staging directory
3. Use [image builder to copy the contents of these services into the
host OS image](illumos/image-builder#4)

Additionally, I made the list of artifacts a bit more explicit.
*Eventually* we could parse the package manifest to access this info,
but for now, I don't want to include any "intermediate" artifacts that
shouldn't be installed on a system.

.github/buildomat/jobs/package.sh

@@ -6,9 +6,14 @@
 #: rust_toolchain = "1.66.1"
 #: output_rules = [
 #:	"=/work/package.tar.gz",
+#:	"=/work/global-zone-packages.tar.gz",
 #:	"=/work/zones/*.tar.gz",
 #: ]
 #:
+#: [[publish]]
+#: series = "image"
+#: name = "global-zone-packages"
+#: from_output = "/out/global-zone-packages.tar.gz"
 
 set -o errexit
 set -o pipefail
@@ -17,10 +22,15 @@ set -o xtrace
 cargo --version
 rustc --version
 
+# Build
 ptime -m ./tools/install_builder_prerequisites.sh -yp
-ptime -m ./tools/create_self_signed_cert.sh -yp
+ptime -m cargo run --locked --release --bin omicron-package -- -t 'image_type=standard switch_variant=asic' package
+ptime -m cargo run --locked --release --bin omicron-package -- -t 'image_type=standard switch_variant=stub' package
 
-ptime -m cargo run --locked --release --bin omicron-package -- package
+tarball_src_dir="$(pwd)/out"
+
+# Assemble some utilities into a tarball that can be used by deployment
+# phases of buildomat.
 
 files=(
 	out/*.tar
@@ -29,6 +39,55 @@ files=(
 	target/release/omicron-package
 	tools/create_virtual_hardware.sh
 )
+
 ptime -m tar cvzf /work/package.tar.gz "${files[@]}"
+
+# Assemble global zone files in a temporary directory.
+if ! tmp=$(mktemp -d); then
+  exit 1
+fi
+trap 'cd /; rm -rf "$tmp"' EXIT
+
+# Header file, identifying this is intended to be layered in the global zone.
+# Within the ramdisk, this means that all files under "root/foo" should appear
+# in the global zone as "/foo".
+echo '{"v":"1","t":"layer"}' > "$tmp/oxide.json"
+
+# Extract the sled-agent tarball for re-packaging into the layered GZ archive.
+pkg_dir="$tmp/root/opt/oxide/sled-agent"
+mkdir -p "$pkg_dir"
+cd "$pkg_dir"
+tar -xvfz "$tarball_src_dir/omicron-sled-agent.tar"
+# Ensure that the manifest for the sled agent exists in a location where it may
+# be automatically initialized.
+mkdir -p "$tmp/root/lib/svc/manifest/site/"
+mv pkg/manifest.xml "$tmp/root/lib/svc/manifest/site/sled-agent.xml"
+cd -
+
+# Extract the mg-ddm tarball for re-packaging into the layered GZ archive.
+pkg_dir="$tmp/root/opt/oxide/mg-ddm"
+mkdir -p "$pkg_dir"
+cd "$pkg_dir"
+tar -xvfz "$tarball_src_dir/maghemite.tar"
+cd -
+
+mkdir -p /work
+cd "$tmp" && tar cvfz /work/global-zone-packages.tar.gz oxide.json root
+cd -
+
+# Assemble Zone Images into their respective output locations.
 mkdir -p /work/zones
-mv out/*.tar.gz /work/zones/
+zones=(
+	out/clickhouse.tar.gz
+	out/cockroachdb.tar.gz
+	out/crucible-pantry.tar.gz
+	out/crucible.tar.gz
+	out/external-dns.tar.gz
+	out/internal-dns.tar.gz
+	out/omicron-nexus.tar.gz
+	out/oximeter-collector.tar.gz
+	out/propolis-server.tar.gz
+	out/switch-asic.tar.gz
+	out/switch-stub.tar.gz
+)
+cp "${zones[@]}" /work/zones/