Add Webhooks for graph execution with configurations

[NiveditJain]

Enable webhooks for graphs with configurations.
Common uses cases of these webhooks could be sending notification in case of failures.

[DhanashreePetare]

@NiveditJain , I would like to work on the issue. Can you please assign this to me.

[Brijesh-Thakkar]

Hi @NiveditJain,
Is this issue still open for contribution?
I’d like to work on adding configurable webhooks for graph execution failures.
Please let me know if I can take this up.