With #32345 completed, we can move to using the IoHost.

• create a global singleton CliIoHost
• change every log statement to use the new CliIoHost
• remove all other logger implementations, instead every call must call ioHost.notify(...)
• We cannot have helpers to call notify
• However we can have helper methods to create IoMessages of the correct type, i.e. ioHost.notify(error("momo made a boo boo")) is fine

This should not require any changes to tests. If so, explain why.