Events for InstanceLoader lack generic entity type

[GlebDurygin]

Environment

• Platform version: 7.2.13

Description of the bug or enhancement

InstanceLoader#addPreLoaderEvent(Consumer<PreLoadEvent> listener) and InstanceLoader#addPostLoaderEvent(Consumer<PostLoadEvent> listener) methods do not have PreLoadEvent and PostLoadEvent have no generic value type.

• Expected behavior

InstanceLoader#addPreLoaderEvent(Consumer<PreLoadEvent<E>> listener)
InstanceLoader#addPostLoaderEvent(Consumer<PostLoadEvent<E>> listener)

• Actual behavior