Better handling of Batch script URL's

[anandhu-eng]

https://automotive.mlcommons-storage.org/Cognata_Dataset_PoC_Demo%2F10002_Urban_Clear_Morning.zip

Lets say this is the original URL link. But when passing the URL to rclone command in run.bat, the %2 is getting omitted and it's modified into:

https://automotive.mlcommons-storage.org/Cognata_Dataset_PoC_DemoF10002_Urban_Clear_Morning.zip

which is invalid.
Currently, its handled independently in 'customize.py'. It could be helpful if we provide a function to convert any given string to safe string in order to execute in windows through batch file.