Consider replacing internal metadata last_status_is_active with last_status

[viniarck]

This is to capture this thread that @italovalcy highlighted, there's an opportunity to consider replacing internal metadata last_status_is_active with last_status, it would be simpler and also more useful since it would also store the last status.

To support this we need to update the internal metadata page and adapt the code and certain conditionals https://github.com/kytos-ng/topology/blob/master/main.py#L768-L774