### Godot version

4.2.dev 80de898d721f952dac0b102d48bb73d6b02ee1e8

### System information

OpenXR

### Issue description

The Godot 3 OpenXR plugin supported obtaining boundary/guardian information in order to obtain play space logic. While we do have a function in the `XRInterface` in Godot 4 that is supposed to retrieve this information (`get_play_area`) it is not implemented on the Godot 4 `OpenXRInterface`.

This logic needs to be ported.

### Steps to reproduce

Call `get_play_area`, be amazed by it not returning data :P

### Minimal reproduction project

Any XR project.
if (!can_render()) {
		return false;
	}
	
	
	for (int i = 0; i < OPENXR_SWAPCHAIN_MAX; i++) {
		if (!swapchains[i].image_acquired && swapchains[i].swapchain != XR_NULL_HANDLE) {
			if (!acquire_image(swapchains[i])) {
				return false;
			}
			swapchains[i].image_acquired = true;
		}
	}
	for (OpenXRExtensionWrapper *wrapper : registered_extension_wrappers) {
		wrapper->on_pre_draw_viewport(p_render_target);
	}
	return true;
}
XrSwapchain OpenXRAPI::get_color_swapchain() {