Clean up any type uses

[msujew]

What it does

Removes a lot of any and Object/object references, cleans up the associated eslint-disable comment and replaces each instance with unknown, making the functions more robust against possible type-related issues.

How to test

1. CI is green and the application continues to work as expected

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[paul-marechal]

Changes look mostly good to me, see comments.

I find using any fine as we can often hit TypeScript's type narrowing's limits... But beside that I don't have very strong opinions about using unknown instead of any.

Thanks for the work!