Get temperature-measurement and all-clusters-app to use examples/comm…

…on/chip-app-server (project-chip#4039)

#### Problem

PR project-chip#3704 introduced a change where a `PeerAddress` is now required in order to start `RendezvousSession`.
Sadly the multiple code paths bootstrapping `RendezvousSession` has not been updated.

PR project-chip#4012 add a fix for some of the `examples/` but not for the `all-clusters-app` nor the `temperature-measurement-app`.

To avoid such situation, this PR merge `examples/common/chip-app-server` and the custom code from `all-clusters-app` and `temperature-measurement-app`.

One of the more discutable change of this PR (imo) is the code that moves the custom `Echo` mechanism from the `all-clusters-app` to `chip-app-server`. I was hoping to get rid of it before doing this change but the `all-clusters-app` and the `temperature-measurement-app` are broken since project-chip#3704 and this PR should fix that.
Also I have a PR (mostly) ready once project-chip#3979 lands to get rid of this `Echo` specific code and replace it by a manufacturer specific `ping` command.

 #### Summary of Changes
 * Remove `EchoServer.cpp`, `RendezvousDeviceDelegate.cpp` and `include/RendezvousDeviceDelegate.h` from `all-clusters-app`
 * Remove `ResponseServer.cpp`, `RendezvousDeviceDelegate.cpp` and `include/RendezvousDeviceDelegate.h` from `temperature-measurement-app`
 * Introduce `chip-app-server/include/AppDelegate.h` in order to keep the behavior the `all-clusters-app` that turns on/off leds on different events. Maybe it should be converted to some types of `ChipDeviceEvent` or `CHIPCallback` at some point.
 * Fix `chip-app-server` to accomodate for the specifics of `all-clusters-app`