Library logging does not work with AWS Lambda Power Tools

Per the lambda best practices, trying to enable structured logging
https://awslabs.github.io/aws-lambda-powertools-python/2.5.0/core/logger/#how-can-i-enable-powertools-logging-for-imported-libraries

```python
from aws_lambda_powertools.logging.logger import Logger
from aws_lambda_powertools.logging import utils

logger = Logger(service='appFlow_Connector')

utils.copy_config_to_registered_loggers(source_logger=logger)
```

But because this [line](https://github.com/awslabs/aws-appflow-custom-connector-python/blob/main/custom_connector_sdk/lambda_handler/lambda_handler.py#L26) in the SDK does not specify a logger name and implicitly uses the root logger, the power tools configuration can't apply the logger configuration to it. Hence logs are output in text format rather than JSON.

```python
def lambda_handler(self, event, context):
logger = logging.getLogger()
logger.setLevel(logging.INFO)
```