### 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.
InteractionProfile *ip = interaction_profile_owner.get_or_null(p_interaction_profile);
	ERR_FAIL_NULL_V(ip, false);
	if (!interaction_profile_supports_io_path(ip->name, p_path)) {
		return false;
	}
	XrActionSuggestedBinding binding;
	Action *action = action_owner.get_or_null(p_action);
	ERR_FAIL_COND_V(action == nullptr || action->handle == XR_NULL_HANDLE, false);
	binding.action = action->handle;
	XrResult result = xrStringToPath(instance, p_path.utf8().get_data(), &binding.binding);
	if (XR_FAILED(result)) {
		print_line("OpenXR: failed to get path for ", p_path, "! [", get_error_string(result), "]");
		return false;
	}
	ip->bindings.push_back(binding);
	return true;
}
bool OpenXRAPI::interaction_profile_suggest_bindings(RID p_interaction_profile) {
	ERR_FAIL_COND_V(instance == XR_NULL_HANDLE, false);
	InteractionProfile *ip = interaction_profile_owner.get_or_null(p_interaction_profile);
	ERR_FAIL_NULL_V(ip, false);
	const XrInteractionProfileSuggestedBinding suggested_bindings = {
		XR_TYPE_INTERACTION_PROFILE_SUGGESTED_BINDING, 
		nullptr, 
		ip->path, 
		uint32_t(ip->bindings.size()), 
		ip->bindings.ptr() 
	};