Add cleanup functions for files created by ORCA

[nakul680]

Create cleanup functions such as :

• Output.cleanup(basename) : To cleanup all files created by the ORCA job within the working directory.
• Output.remove_temp_files() : To clean up all temporary files created by ORCA within the working directory.
• Output.remove_working_dir(): To remove the entire working directory

[haneug]

cleanup and remove should both take basename as argument and only delete files associated with the basename as users could run multiple jobs in one folder.