Change default "extra" contents of activity/workflow logs

[cretz]

What was changed

• Changed temporalio.activity.logger to add temporal_activity, which is a dict of info, on the log record by default
• 💥 Changed temporalio.activity.logger to not add activity_info, which is the full info dataclass, on the log record by default
  • This is an incompatible change, temporalio.activity.logger.full_activity_info_on_extra can be set to True to re-enable
• Changed temporalio.workflow.logger to add temporal_workflow, which is a dict of info, on the log record by default
• 💥 Changed temporalio.workflow.logger to not add workflow_info, which is the full info dataclass, on the log record by default
  • This is an incompatible change, temporalio.workflow.logger.full_workflow_info_on_extra can be set to True to re-enable

This was done because log handlers like DataDog work much better with nested dictionaries than they do with nested data classes

Checklist

1. Closes #489