Fix getting missing libblockdev technologies with Python 3.14

Hotfix for rhbz#2371256. Technologies in libblockdev are defined
as enums and we are using 'value_name' to get the technology name/
description in blivet. For some unknown reason the 'value_name'
attribute from GLib.GEnumValue is not available with Python 3.14.
This needs to be investigated more thoroughly, but for now we can
just not include this information.

Resolves: rhbz#2371256

Author: vojtechtrefny

blivet/tasks/availability.py

@@ -225,7 +225,7 @@ def _check_technologies(self):
             try:
                 self._tech_info.check_fn(tech, mode)
             except GLib.GError as e:
-                errors.append("%s: %s" % (tech.value_name, e.message))
+                errors.append("%s" % e.message)
         return errors
 
     def availability_errors(self, resource):