feat: wipe out canister ID mappings when network start

[lwshang]

When icp network run, the canister ID mappings of environments that point to the current managed network will be deleted.

Test

This is test manually in examples/icp-pre-built.

The following workflow failed before this PR:

Terminal 1	Terminal 2
icp network run
	icp deploy
CTRL-C
icp network run
	icp deploy

I tried to add an integration test for it. But this not trivial because:

• The test framework doesn't support stopping a non-background network
• Start network twice result in panic
• icp network run --background then icp deploy would fail with:
  • "agent error: An error happened during communication with the replica"