AutoComplete memory leak

[yanmariomenev]

Description

It seems that there might be a memory leak in the component, and we need to make sure that everything is handled properly, including subscriptions and other resources.

Steps To Reproduce

project.zip

1. Open Chrome DevTools → Memory tab.
2. Navigate to the component with an input using kendoTextBox.
3. Click the input to trigger any internal behavior.
4. Navigate away to destroy the component.
5. Take a Heap Snapshot.
6. Repeat steps 2–5.
7. Compare snapshots for retained component instances or detached DOM nodes.