consolidate and streamline build (#2469)

* consolidate and streamline build

* fix workflow syntax

* fix workflow syntax

* fix workflow syntax

* fix workflow syntax

* fix build scripts

* only build platform-specific system images

* fix build script

* more build fixes

* fix

* fix compat build for x86

* wat

* checkout

* Prevent rebuild of compiled artifacts

* Update startos-iso.yaml

* Update startos-iso.yaml

* fix raspi build

* handle missing platform better

* reduce arm vcpus

* remove arch and platform from fe config, add to patch db

---------

Co-authored-by: Matt Hill <mattnine@protonmail.com>

image-recipe/prepare.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+set -e
+set -x
+
+export DEBIAN_FRONTEND=noninteractive
+apt-get install -yq \
+	live-build \
+	procps \
+	systemd \
+	binfmt-support \
+	qemu-utils \
+	qemu-user-static \
+	qemu-system-x86 \
+	qemu-system-aarch64 \
+	xorriso \
+	isolinux \
+	ca-certificates \
+	curl \
+	gpg \
+	fdisk \
+	dosfstools \
+	e2fsprogs \
+	squashfs-tools \
+	rsync