fix: comma in entrypoint and cmd

[thesayyn]

Closes #659 and #631

Reason why i changed the delimiter from , to \n

• Easier to create a file in a genrule, simply echo without the -n makes it work.
• We no longer use crane so don't need to conform to their cmd and entrypoint must be a valid csv

[thesayyn]

cc @mrmeku