Add ability to swallow all output for particular tasks when sending webhooks

[jbeemster]

The idea being that some information might not be suitable for transmission.

[ninjabear]

does adding >& /dev/null do the trick here?

[jbeemster]

It would yeah - but we only want this to apply to Webhooks - so you could define a task within a DAG to output normally to the local log but not to emit the information in the webhook.

[ninjabear]

Oh I see what you mean