Support removing a removed Component's required components

[cart]

What problem does this solve or what need does it fill?

Sometimes it is desirable to remove not just a specific component, but also its required components: #15572 (comment).

What solution would you like?

Add an entity.remove_with_requires::<SomeComponent>() API that removes all required components brought in by SomeComponent (recursively).

What alternative(s) have you considered?

• This should not be the default behavior of entity.remove::<SomeComponent>(), as in many cases this could remove components that are required by other components. If we want to go this route, we need to consider building some sort of reference counting system to track requires across components. But there are still problems there (ex: what if someone manually added a component ... how do we distinguish between overriding a required component value and inserting a new separate persistent component).

[cart]

Adding to the milestone because this is necessary for parity with "bundle removals".

[tim-blackbird]

There is an implementation of this here: #15026

[ecoskey]

For a naming suggestion, maybe prune?

[MalekiRe]

Should this only remove required components that aren't required by other components on the entity?

Maybe there should be two versions, a hard and soft version

[pablo-lua]

#15026 Merged, closing this as completed.