Statsig

- Remove call to `logging.setLoggerClass` which was overwriting the global logger

Being defensive about how many times initialize here

String formatting was causing issues in celery with django environment. Removed as it was not necessary.

No longer overrides the default level of the python root logger.

Also limit a single failure to 10 retries

* New StatsigOptions:
`init_timeout` - Maximum number of seconds before initialize will timeout
`logging_interval` - Number of seconds to wait in between logging each batch of events
* New API:

check_gate_with_exposure_logging_disabled
get_config_with_exposure_logging_disabled
get_experiment_with_exposure_logging_disabled
get_layer_with_exposure_logging_disabled

manually_log_gate_exposure
manually_log_config_exposure
manually_log_experiment_exposure
manually_log_layer_parameter_exposure

* Allow passing enums in user fields
* Print logs limited to print every 2 minutes for the same warning/error
* Print initialize and syncing progress with timestamps