fix: remove inert if user cycles through whole list/dnd multiple times via keyboard dnd

[LFDanLu]

the root cause is because in a virtualizer node reuse/reorder case triggered by the mutation observer, we were removing the node from the hidden nodes list prematurely even though it was going to be readded immediately after, causing the ref count to erroneously increment by 1 again via acceptNode's check

from testing

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Go to virtualized tree DnD/tableview dnd/ any virtualized DnD experience and test keyboard drag and drop. In particular, try starting a keyboard drag session, holding ArrowDown to cycle through the list multiple times, then canceling your drop. You should still be able to navigate to each row after that

🧢 Your Project:

RSP