### 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 (view_configuration_views != nullptr) {
		
		memfree(view_configuration_views);
		view_configuration_views = nullptr;
	}
	XrResult result = xrEnumerateViewConfigurationViews(instance, system_id, p_configuration_type, 0, &view_count, nullptr);
	if (XR_FAILED(result)) {
		print_line("OpenXR: Failed to get view configuration count [", get_error_string(result), "]");
		return false;
	}
	view_configuration_views = (XrViewConfigurationView *)memalloc(sizeof(XrViewConfigurationView) * view_count);
	ERR_FAIL_NULL_V(view_configuration_views, false);
	for (uint32_t i = 0; i < view_count; i++) {
		view_configuration_views[i].type = XR_TYPE_VIEW_CONFIGURATION_VIEW;
		view_configuration_views[i].next = nullptr;
	}
	result = xrEnumerateViewConfigurationViews(instance, system_id, p_configuration_type, view_count, &view_count, view_configuration_views);
	ERR_FAIL_COND_V_MSG(XR_FAILED(result), false, "OpenXR: Failed to enumerate view configurations");
	for (uint32_t i = 0; i < view_count; i++) {
		print_verbose("OpenXR: Found supported view configuration view");
		print_verbose(String(" - width: ") + itos(view_configuration_views[i].maxImageRectWidth));
		print_verbose(String(" - height: ") + itos(view_configuration_views[i].maxImageRectHeight));
		print_verbose(String(" - sample count: ") + itos(view_configuration_views[i].maxSwapchainSampleCount));
		print_verbose(String(" - recommended render width: ") + itos(view_configuration_views[i].recommendedImageRectWidth));
		print_verbose(String(" - recommended render height: ") + itos(view_configuration_views[i].recommendedImageRectHeight));
		print_verbose(String(" - recommended render sample count: ") + itos(view_configuration_views[i].recommendedSwapchainSampleCount));
	}
	return true;
}
void OpenXRAPI::destroy_instance() {