Update logic to fetch soon starting streams

[carlobortolan]

Motivation and Context

Currently, if a professor has two lectures planned directly after each other, there could be conflicts about which stream to choose. E.g., If there's one lecture from 2-4 p.m. and one from 4-6 p.m. and the professor starts streaming at 3:59 p.m., the first lecture is selected. However, if the professor starts at 4 or 4:01 p.m., one might expect the second one to be selected, but it still selects the first one, as there's a buffer of 15 minutes before/after each lecture.

Description

• Updated GetSoonStartingStream method to consider the case when two lectures from the same professors start right after each other.
• Fix typo in token tab
• Update self-streaming guide links to redirect to the new documentation page
• Update go.work.sum file
• Disable self-streams using rtmp-proxy (see Test courses for lecturers #1418)

Steps for Testing

• Log in using a lecturer account and go to the admin tab

Screenshots

[github-actions]

Your Testserver will be ready at https://1417.test.live.mm.rbg.tum.de in a few minutes.

Logins

Kurs1	Kurs2	Kurs3	Kurs4
public	public	loggedin	enrolled
prof1	prof1	prof2	prof1 prof2
student1 student2 student3	student1 student2	student2 student3	student1 student2