[10.x] Refactor hardcoded lock/wait for integers

[bytestream]

This is an alternative solution to #48795 which was closed with the reason:

You can define it on the route / route group.

Contrary to this statement, it cannot be defined on route groups, only individual routes. Regardless of that, I think it's in the best interests of the framework to not hard code values. Developers can now easily override the default locksFor and waitsFor values without having to rewrite the entire handleRequestWhileBlocking() method.

[taylorotwell]

Re-opening your previous PR.