Add limit option to application:ensure_all_started/3 to control max concurrency #10581
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NOTE: This is on-top of PR9558
We have experienced issues with parallel application startup in cases where many applications get ready to start at once (several hundred). This results in a large queue size and overloading the controller.
We solved this by adding a limit to how many applications can start in parallel.
This PR adds this option to application:ensure_all_started/3