Add a way to invalidate cache for all loaders at once.

[minht11]

Currently there it is possible to invalidate cache of an individual loader, but no way to do that for all of them at once.

Use case

User logs out, loaders are cached, another user logs in. To prevent new user seeing previous user data, we need to invalidate previous user loaders, but doing it manually is cumbersome, needing to account for all loaders.

Proposed solution

Add a way to invalidate cache for all loaders at once.

[posva]

I think this is a good idea. I will need to explore more of the cache invalidation.