refactor HookCollectorPass::checkForProceduralOnlyHooks() so it can be used by other code

I've raised an MR!11764 implementing the suggested solution for this issue. The PR refactors the HookCollectorPass::checkForProceduralOnlyHooks() method to make it more reusable by other components.

Kindly review.

Looks great, thanks!

Oh wait, the hook attribute takes a short hook name:

> #[Hook('field_type_category_info_alter')]

which means the method probably does too.

We should document it's the short hook name, without the 'hook_' prefix -- see the docs on the Hook attribute class for an example.