Change solution for tracking logs (#308)

* Change tracking logs method.

* Change version to generate dev package.

* Change path name in S3

Author: moromimay

butterfree/_cli/migrate.py

@@ -115,7 +115,6 @@ class Migrate:
 
     def __init__(self, pipelines: Set[FeatureSetPipeline],) -> None:
         self.pipelines = pipelines
-        self.spark_client = spark_client or SparkClient()
 
     def _send_logs_to_s3(self, file_local: bool, debug_mode: bool) -> None:
         """Send all migration logs to S3."""