Part 1 of #80440

The goal of this PR is to move the resident runners closer to a state where enough of the implementation is shared to enable 1) profile/release/debug autodetect for flutter attach and 2) simultaneous connections to web and non-web devices. I also wanted to remove the vast amounts of duplicated test logic due to the web and non-web resident runners having different service extension impls as well as remove the mocks from the terminal handler test and re-imagine it as a fairly high level interaction test.

Changes in resident_runner.dart:

• Creates a new class ResidentHandlers which contains the vm service delegation, make it easier to share with the web impl for now. This required exposing Logger and FileSystem as protected members.
  ( Removes all of the wrapper vm service functionality from the FlutterDevice class. Now that the logic is in a single place it doesn't make as much sense to split it up.
• Updates FlutterDevice to conditionally use getVM's isolate list instead of listing the flutter views. The flutter view RPC is not supported on the web, but since there is only ever one isolate we can use the VM list. This required exposing the TargetPlatform field on FlutterDevice, which was already part of the constructor.

This does not update all of the test cases, but does delete the old test cases that interacted with a FlutterDevice directly.
This does not replace the web implementation, that will be done in part 2