fix: python self referencing property types not using forward reference

[jonaslagoni]

Description

This PR fixes a problem where the Python generator cannot handle self-referencing properties i.e. in the constructor everything works fine, but in the getters and setters we must use '<self reference type>'. Also the changed constructor to use if 'tuple_model' in input instead of if hasattr(input, 'tuple_model'):.

class Address: 
  def __init__(self, input: Dict):
    if 'self_model' in input:
      self._self_model: Address = Address(input['self_model'])
    if 'array_model' in input:
      self._array_model: List[Address] = input['array_model']
    if 'tuple_model' in input:
      self._tuple_model: tuple[Address] = input['tuple_model']
    if 'map_model' in input:
      self._map_model: dict[str, Address] = input['map_model']
    if 'union_model' in input:
      self._union_model: Address = input['union_model']

  @property
  def self_model(self) -> 'Address':
    return self._self_model
  @self_model.setter
  def self_model(self, self_model: 'Address'):
    self._self_model = self_model

  @property
  def array_model(self) -> List['Address']:
    return self._array_model
  @array_model.setter
  def array_model(self, array_model: List['Address']):
    self._array_model = array_model

  @property
  def tuple_model(self) -> tuple['Address']:
    return self._tuple_model
  @tuple_model.setter
  def tuple_model(self, tuple_model: tuple['Address']):
    self._tuple_model = tuple_model

  @property
  def map_model(self) -> dict[str, 'Address']:
    return self._map_model
  @map_model.setter
  def map_model(self, map_model: dict[str, 'Address']):
    self._map_model = map_model

  @property
  def union_model(self) -> 'Address':
    return self._union_model
  @union_model.setter
  def union_model(self, union_model: 'Address'):
    self._union_model = union_model

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[jonaslagoni]

Still need some work

[sonarqubecloud]

Quality Gate passed

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[asyncapi-bot]

🎉 This PR is included in version 4.0.0-next.20 🎉

The release is available on:

• npm package (@next dist-tag)
• GitHub release

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