input: Write a python function to create an instance of the class `techsupport_args` and set the `scope` attribute.
  assert set_scope_instance("NODE").scope == "NODE"
  assert set_scope_instance("CLUSTER").scope == "CLUSTER"
  assert set_scope_instance("INVALID").scope == "INVALID"
output: class techsupport_args:
      def __init__(self):
          self.scope = None
  
  def set_scope_instance(scope_value):
      instance = techsupport_args()
      instance.scope = scope_value
      return instance