fix/failing_tests

[douglascdev]

Fix failing tests. Changes so far:

• Temporarily disabled code formatting to avoid a bunch of changed files by GitHub actions when the tests start passing again.
• Started explicitly referencing interval and delay arguments to make it clear to who is reading the tests what the argument is.
• Changed how the scheduled item interval is added to get the next interval(details are commented on the code).
• Made some changes that should mostly fix the tests for the scheduler(details are commented on the code).

I don't know if the changes I made make sense, so I commented on every change to the code with my reasoning for doing it, hoping I can get a review on whether they make sense or not. I'm skipping two more tests that I don't know how to fix, hoping to fix those after getting some feedback as well.

[douglascdev]

I'll be closing this one since bitcraft is a lot more acquainted with how the tests should behave and will do a much better job at fixing them.

@bitcraft thank you for taking the time to review it :blush: