file submission with special characters will fail to download

[RA341]

Subject of the issue

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When making a file submissions, if the file name contains special characters, it will no longer be able to be downloaded, since the path will be different in multer and what we store in the database

Expected behaviour

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The filename should be URL encoded before uploading and the same string should be stored in the database

Actual behaviour

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The file name is stored without encoding

Steps to reproduce

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Make a file submission to an assignment that contains special characters or spaces "hello_ world"
try to retrieve this file using
localhost:3001/course/1/file-upload/