Add endpoint to kill all segments belonging to a data source

https://github.com/apache/incubator-druid/blob/9b197b436b4489195ad589b44978d0a9e08d2c3f/web-console/src/views/datasource-view.tsx#L306

It's better to add an endpoint to kill all data properly rather than using `1000/3000` workaround.

FYI @vogievetsky @surekhasaharan

Start with web-console/src/views/datasource-view.tsx at line 306 and trace the current 1000/3000 workaround. Then identify the Druid API entry points for removing segments belonging to a data source and define the endpoint behavior. Done means the endpoint can kill all such segments properly instead of relying on the workaround.

Written by the indexing model from the issue text.