Sunset Shared Secred encryption option

[toger5]

Your use case

What would you like to do?

Remove all code that is related with Shared Secred encryption.

Why would you like to do it?

If to-device key exchange is performant enough to support large calls this would simplify our codebase and make calls more secure.

How would you like to achieve it?

Draft a strategy on how we can leave shared secret encryption. We would need a way to verify users. The invite link would need to contain a join secret so we have an actually more secure system.

Have you considered any alternatives?

Keep shared secret as a long term solution and continue maintaining it.

Additional context

No response