[Feature Request] Run reset-batch as an internal workflow within Temporal

[tszucs-stripe]

Is your feature request related to a problem? Please describe.

Running reset-batch on a large number of workflows can be problematic, as the resetting is done within the CLI and not within an internal workflow. This can be a risk within remediation of an incident because we are relying on the connection between a laptop and the temporal server which could have several failures and/or rate-limiters.

Describe the solution you'd like

It would be great if reset-batch was ran as an internal workflow within Temporal, like some of the other commands. This would help ensure reliability and improve remediation speed in the case of an incident with a large number of workflows.

Additional context

Also posted another issue from this particular incident at #239.

[feedmeapples]

we are updating the batch APIs https://github.com/temporalio/api/blob/master/temporal/api/batch/v1/message.proto

asked the server team about adding the reset API, i'll keep you posted

[feedmeapples]

discussing with @yiminc @yux0 this and resetting open child workflows, which one to take on first