### 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 (graphics_extension) {
		return graphics_extension->get_swapchain_format_name(p_swapchain_format);
	}
	return String("Swapchain format ") + String::num_int64(int64_t(p_swapchain_format));
}
bool OpenXRAPI::load_layer_properties() {
	
	if (layer_properties != nullptr) {
		
		return true;
	}
	
	XrResult result = xrEnumerateApiLayerProperties(0, &num_layer_properties, nullptr);
	ERR_FAIL_COND_V_MSG(XR_FAILED(result), false, "OpenXR: Failed to enumerate number of api layer properties");
	layer_properties = (XrApiLayerProperties *)memalloc(sizeof(XrApiLayerProperties) * num_layer_properties);
	ERR_FAIL_NULL_V(layer_properties, false);
	for (uint32_t i = 0; i < num_layer_properties; i++) {
		layer_properties[i].type = XR_TYPE_API_LAYER_PROPERTIES;
		layer_properties[i].next = nullptr;
	}
	result = xrEnumerateApiLayerProperties(num_layer_properties, &num_layer_properties, layer_properties);
	ERR_FAIL_COND_V_MSG(XR_FAILED(result), false, "OpenXR: Failed to enumerate api layer properties");
	for (uint32_t i = 0; i < num_layer_properties; i++) {
		print_verbose(String("OpenXR: Found OpenXR layer ") + layer_properties[i].layerName);
	}
	return true;
}
bool OpenXRAPI::load_supported_extensions() {