tools: add deploy-qemu and gen-user-data

tools/gen-user-data generates a cloud-init user-data file from a
configuration directory. It is mostly useful to embed files in the
user-data.

tools/deploy-qemu uses above tool to make a user-data file and spins up
a virtual machine with it. This is useful to locally run, test, and
debug osbuild-composer.

A simple user-data directory for running tests locally is included in
tests/deploy-user-data. It expects a repository with osbuild-composer
rpms to be served on the host's port 8000.

tools/deploy/test/files/run/provision-scripts/deploy.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+dnf -y install osbuild-composer-tests

tools/deploy/test/files/run/provision-scripts/provision.sh

@@ -0,0 +1 @@
+../../../../../../schutzbot/provision.sh

tools/deploy/test/user-data.yml

@@ -0,0 +1,16 @@
+#cloud-config
+yum_repos:
+  osbuild:
+    name: osbuild
+    baseurl: "http://10.0.2.2:8000"
+    enabled: true
+    gpgcheck: false
+user: admin
+password: foobar
+ssh_pwauth: True
+chpasswd:
+  expire: False
+sudo: 'ALL=(ALL) NOPASSWD:ALL'
+runcmd:
+  - /run/provision-scripts/deploy.sh
+  - /run/provision-scripts/provision.sh