one shot system cleanup

[pemattern]

Objective

• Fixes #16497
• This is my first PR, so I'm still learning to contribute to the project

Solution

• Added struct UnregisterSystemCached and function unregister_system_cached
• renamed World::run_system_with_input to run_system_with
• reordered input parameters for World::run_system_once_with

Testing

• Added a crude test which registers a system via World::register_system_cached, and removes it via Command::unregister_system_cached.

Migration Guide

• Change all occurrences of World::run_system_with_input to World::run_system_with.
• swap the order of input parameters for World::run_system_once_with such that the system comes before the input.

[github-actions[bot]]

Welcome, new contributor!

Please make sure you've read our contributing guide and we look forward to reviewing your pull request shortly ✨

[github-actions[bot]]

It looks like your PR is a breaking change, but you didn't provide a migration guide.

Could you add some context on what users should update when this change get released in a new version of Bevy? It will be used to help writing the migration guide for the version. Putting it after a ## Migration Guide will help it get automatically picked up by our tooling.

[pemattern]

I added a migration guide.