File Upload, Part 2: Update File Delete/Update endpoints

[RyanSh3n]

Notion ticket link

Implement File Upload

Implementation description

• Added delete, update file endpoints
• Updated the delete, update methods for intake objects to include the file endpoints

Steps to test

1. Use Postman to test delete and update endpoints
2. For DELETE: use http://localhost:5000/intake?intake_id={file_id}
3. For PUT: use http://localhost:5000/intake/{file_id}
4. replace file_id with the file to be deleted or updated

What should reviewers focus on?

• the integration of the update and delete file endpoints into the regular update and delete intake endpoints

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR