The useOverlayPosition hook accepts a placement prop bottom, but return the placement is top

### Provide a general summary of the issue here

The useOverlayPosition hook accepts a placement prop bottom, but return the placement is top
As in the Prpover Usage case on the website, the behaviour on the UI will be top, even though the placement is set to bottom.

### 🤔 Expected Behavior?

when i input the placement is bottom, it should return a bottom

### 😯 Current Behavior

when I input the placement bottom, the useOverlayPosition return top

### 💁 Possible Solution

_No response_

### 🔦 Context

_No response_

### 🖥️ Steps to Reproduce

https://react-spectrum.adobe.com/react-aria/usePopover.html

### Version

@react-aria/overlays-3.22.1

### What browsers are you seeing the problem on?

Firefox, Chrome, Safari, Microsoft Edge

### If other, please specify.

_No response_

### What operating system are you using?

mac

### 🧢 Your Company/Team

_No response_

### 🕷 Tracking Issue

_No response_

Start by reproducing the issue through the usePopover usage case at https://react-spectrum.adobe.com/react-aria/usePopover.html, using @react-aria/overlays-3.22.1 and placement set to bottom. Trace the useOverlayPosition hook entry point and verify the reported placement across the listed browsers; done means bottom is returned and reflected in the UI when bottom is requested.

Written by the indexing model from the issue text.