Tasks: It should be easy to extract the task name when querying the _tasks bucket

[russorat]

right now, task name is not added as a tag in the _tasks bucket, runs measurement. This makes querying for tasks by name difficult. It also makes extracting task names when building custom tasks difficult.

You can do something like this: https://github.com/influxdata/community-templates/blob/master/downsampling/monitoring_task.yml#L20

But since we already have the ID as a tag, we should just make the name and every a tag as well.