[later phase] Make Component `audit` operation performant/scalable

Overview

#3457504: XB field type: calculate all dependencies, store them, surface in new Component "Audit" operation introduced:

1. the audit operation on Component config entities
2. the \Drupal\experience_builder\Audit\ComponentAudit service
3. the \Drupal\experience_builder\Controller\ComponentAuditController (+ test)

However, it's implemented in the most naïve/simple way possible — intentionally! — and for example loads every entity revision 😅

Proposed resolution

So we'll need to improve that. If we don't do that before 1.0, we'll need to gate it behind xb_dev_mode.

1. remove ::loadMultiple() and ::loadMultipleRevisions() from the critical path in \ComponentTreeDependencyRepository::getConfigurationDependents(), because not every caller needs the loaded objects
2. add static caching to \Drupal\experience_builder\Audit\ComponentAudit::getConfigEntityUsageCount()

User interface changes

TBD