fix: Explicitly stop EnlightenStatusPrinter manager

Enlighten registers logic to (at least partially) reset the terminal
using the `atexit` library and clean up, but we should explicitly close
the Enlighten manager when we cleanup/exit the status printer to make
sure that the terminal is fully restored to its normal working state.

Signed-off-by: Alex Jones <alex.jones@lowrisc.org>

Author: AlexJones0

src/dvsim/utils/status_printer.py

@@ -202,6 +202,7 @@ def exit(self) -> None:
             self.status_header.close()
         for target in self.status_target:
             self.status_target[target].close()
+        self.manager.stop()
 
 
 def get_status_printer(interactive: bool) -> StatusPrinter: