Separate the data caching directory and Execution_Assets/ Metadata directory

[Zhiweiii]

The data caching directory needs to be a shared directory. While the Execution_Asset/Metadata directory is a one-off that needs to be cleared after the files are uploaded to the catalog. We need the following changes:

1. Separate the data caching directory and Execution_Asset/Metadata directory
2. Add a method to clear the Execution_Asset/Metadata dir after upload and deal with upload failure.