feat: Add str() blacklist for CodePipeline Data

Add _str_blacklist for CodePipelineArtifactCredentials to prevent
logging out the secret_access_key and session_token properties.

Author: neilramsay

aws_lambda_powertools/utilities/data_classes/code_pipeline_job_event.py

@@ -80,6 +80,8 @@ def location(self) -> CodePipelineLocation:
 
 
 class CodePipelineArtifactCredentials(DictWrapper):
+    _str_sensitive_data = ["secret_access_key", "session_token"]
+
     @property
     def access_key_id(self) -> str:
         return self["accessKeyId"]