INTPYTHON-527 Add Queryable Encryption config

[aclark4life]

(this is a branch of #317 for convenience in providing a POC of QE config)

[aclark4life]

I'll redo this after transactions are merged but here you can see some helpers added to utils along with a failing test because I haven't installed encryption libs yet.

ERROR: test_queryable_encryption_config (backend_.utils.test_parse_uri.ParseURITests.test_queryable_encryption_config)
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Traceback (most recent call last):
  File "/Users/alex.clark/Developer/django-mongodb-cli/src/django-mongodb-backend/tests/backend_/utils/test_parse_uri.py", line 100, in test_queryable_encryption_config
    auto_encryption_options = get_auto_encryption_options("local")
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/alex.clark/Developer/django-mongodb-cli/src/django-mongodb-backend/django_mongodb_backend/utils.py", line 83, in get_auto_encryption_options
    auto_encryption_opts = AutoEncryptionOpts(
                           ^^^^^^^^^^^^^^^^^^^
  File "/Users/alex.clark/Developer/django-mongodb-cli/src/mongo-python-driver/pymongo/encryption_options.py", line 213, in __init__
    raise ConfigurationError(
pymongo.errors.ConfigurationError: client side encryption requires the pymongocrypt library: install a compatible version with: python -m pip install 'pymongo[encryption]'