inspector: Add <windows_group_policy/> is Windows GPOs detected in guest

Fixes: https://issues.redhat.com/browse/RHEL-125955

Author: rwmjones

inspector/inspector.c

@@ -439,6 +439,9 @@ output_root (xmlTextWriterPtr xo, char *root)
     if (str)
       single_element ("windows_current_control_set", str);
     free (str);
+    i = guestfs_inspect_get_windows_group_policy (g, root);
+    if (i > 0)
+      empty_element ("windows_group_policy");
     guestfs_pop_error_handler (g);
 
     str = guestfs_inspect_get_hostname (g, root);

inspector/virt-inspector.rng

@@ -35,6 +35,7 @@
             <element name="minor_version"><text/></element>
             <optional><element name="windows_systemroot"><text/></element></optional>
             <optional><element name="windows_current_control_set"><text/></element></optional>
+            <optional><element name="windows_group_policy"><empty/></element></optional>
             <optional><ref name="ospackageformat"/></optional>
             <optional><ref name="ospackagemanagement"/></optional>
             <optional><element name="hostname"><text/></element></optional>

m4/guestfs-libraries.m4

@@ -21,6 +21,7 @@ dnl Of course we need libguestfs.
 dnl
 dnl We need libguestfs 1.57.1 for guestfs_setfiles.
 dnl We need libguestfs 1.57.6 for guestfs_inspect_get_applications2 app2_class.
+dnl We need libguestfs 1.57.6 for guestfs_inspect_get_windows_group_policy
 PKG_CHECK_MODULES([LIBGUESTFS], [libguestfs >= 1.57.6])
 printf "libguestfs version is "; $PKG_CONFIG --modversion libguestfs