use latest psycopg2 package

[jtriley]

The version pin in requirements.txt was due to being on django 2.x (see: psycopg/psycopg2#1293). We're now at django 3.2.20 and have updated to python3.12 so this should be removed. The older version is throwing exceptions with newer python.

SystemError: type psycopg2.extensions.ReplicationConnection has the Py_TPFLAGS_HAVE_GC flag but has no traverse function

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/opt/venv/lib/python3.12/site-packages/django/__main__.py", line 9, in <module>
    management.execute_from_command_line()
  File "/opt/venv/lib/python3.12/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/opt/venv/lib/python3.12/site-packages/django/core/management/__init__.py", line 395, in execute
    django.setup()
  File "/opt/venv/lib/python3.12/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/opt/venv/lib/python3.12/site-packages/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/opt/venv/lib/python3.12/site-packages/django/apps/config.py", line 301, in import_models
    self.models_module = import_module(models_module_name)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/venv/lib/python3.12/site-packages/django/contrib/auth/models.py", line 3, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "/opt/venv/lib/python3.12/site-packages/django/contrib/auth/base_user.py", line 48, in <module>
    class AbstractBaseUser(models.Model):
  File "/opt/venv/lib/python3.12/site-packages/django/db/models/base.py", line 122, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "/opt/venv/lib/python3.12/site-packages/django/db/models/base.py", line 326, in add_to_class
    value.contribute_to_class(cls, name)
  File "/opt/venv/lib/python3.12/site-packages/django/db/models/options.py", line 207, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
                                                 ^^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.12/site-packages/django/utils/connection.py", line 15, in __getattr__
    return getattr(self._connections[self._alias], item)
                   ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.12/site-packages/django/utils/connection.py", line 62, in __getitem__
    conn = self.create_connection(alias)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.12/site-packages/django/db/utils.py", line 204, in create_connection
    backend = load_backend(db['ENGINE'])
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.12/site-packages/django/db/utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.12/site-packages/django/db/backends/postgresql/base.py", line 25, in <module>
    import psycopg2 as Database
  File "/opt/venv/lib/python3.12/site-packages/psycopg2/__init__.py", line 51, in <module>
    from psycopg2._psycopg import (                     # noqa
SystemError: initialization of _psycopg raised unreported exception