Support stalls for resumable write

[Tulsishah]

Is your feature request related to a problem? Please describe.
I would like to inject a retriable stall for writes. This will be beneficial to test intermittent stall scenario.

Currently, we have support for stall-always, which stalls the request every time and not useful to test the intermittent stall for resumble writes.

Describe the solution you'd like
Support injection of retriable stall using x-retry-test-id header. Also, useful if we can provide the controllable stall delay.

Describe alternatives you've considered
NA

Additional context
NA