chore: collect image builder's osbuild.facts

#3848 added an image builder fact to the
subscription_manage parser, but there are multiple facts present in
osbuild.facts. Just expose all of them.

insights/specs/__init__.py

@@ -267,6 +267,7 @@ class Specs(SpecSet):
     ifcfg = RegistryPoint(multi_output=True)
     ifcfg_static_route = RegistryPoint(multi_output=True)
     imagemagick_policy = RegistryPoint(multi_output=True, filterable=True, no_obfuscate=['ip'])
+    image_builder_facts = RegistryPoint()
     init_ora = RegistryPoint()
     init_process_cgroup = RegistryPoint(no_obfuscate=['hostname', 'ip'])
     initctl_lst = RegistryPoint(no_obfuscate=['hostname', 'ip'])

insights/specs/default.py

@@ -279,6 +279,7 @@ class DefaultSpecs(Specs):
     ifcfg = glob_file("/etc/sysconfig/network-scripts/ifcfg-*")
     ifcfg_static_route = glob_file("/etc/sysconfig/network-scripts/route-*")
     imagemagick_policy = glob_file(["/etc/ImageMagick/policy.xml", "/usr/lib*/ImageMagick-6.5.4/config/policy.xml"])
+    image_builder_facts = simple_file("/etc/rhsm/facts/osbuild.facts")
     init_process_cgroup = simple_file("/proc/1/cgroup")
     initctl_lst = simple_command("/sbin/initctl --system list")
     insights_client_conf = simple_file('/etc/insights-client/insights-client.conf')