tests: add pkg_tinyusb_netdev for tinyUSB netdec

tests/pkg_tinyusb_netdev/Makefile

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+BOARD ?= samr21-xpro
+
+include ../Makefile.tests_common
+
+USB_VID ?= $(USB_VID_TESTING)
+USB_PID ?= $(USB_PID_TESTING)
+
+CLASS ?= tinyusb_class_net_rndis
+
+USEPKG += tinyusb
+
+USEMODULE += auto_init_gnrc_netif
+USEMODULE += gnrc_ipv6_router_default
+USEMODULE += gnrc_icmpv6_echo
+USEMODULE += shell
+USEMODULE += shell_cmds_default
+USEMODULE += ps
+USEMODULE += tinyusb_netdev
+USEMODULE += $(CLASS)
+
+include $(RIOTBASE)/Makefile.include

tests/pkg_tinyusb_netdev/Makefile.ci

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+BOARD_INSUFFICIENT_MEMORY := \
+    stm32f7508-dk \
+    #

tests/pkg_tinyusb_netdev/README.md

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+Overview
+========
+
+This test application can be used to check the implementation of the tinyUSB
+netdev driver. The implementation of the tinyUSB netdev driver uses Ethernet
+over USB and supports the following protocols:
+
+- CDC ECM (Ethernet Control Model)
+- CDC NCM (Network Control Model)
+- RNDIS (Microsoft Remote NDIS)
+
+While Linux and macOS support all these protocols, Microsoft Windows only
+supports RNDIS and since Windows version 11 also CDC NCM. Which protocol is
+used is selected by the corresponding pseudomodules `tinyusb_class_net_cdc_ecm`,
+`tinyusb_class_net_cdc_ncm` and `tinyusb_class_net_rndis`.
+
+Configuration
+=============
+The test application use the protocol defined by the CLASS variable, which
+defaults to the RNDIS protocol (`tinyusb_class_net_rndis`). This can be
+changed by setting this variable in the make command line, for example:
+```
+CLASS=tinyusb_class_net_cdc_ecm BOARD=... make -C tests/pkg_tinyusb_netdev flash
+```
+The CDC ECM protocol (`tinyusb_class_net_cdc_ecm`) and the RNDIS protocol
+(`tinyusb_class_net_rndis`) can be used simultaneously to support all operating
+systems, for example :
+```
+CLASS='tinyusb_class_net_rndis tinyusb_class_net_cdc_ecm' \
+BOARD=... make -C tests/pkg_tinyusb_netdev flash
+```
+In this case, the CDC ECM protocol is the default protocol and the RNDIS
+protocol the alternative protocol defined as second device configuration.
+
+The CDC NCM protocol cannot be used together with the CDC ECM or the RNDIS
+protocol
+
+Expected result
+===============
+
+Use the network related shell commands to verify the network link between the
+board under test and the host computer. Ping to the link local address from and
+to the host computer must work.
+
+On the host computer, using tools such as `ethtool` must show the USB CDC ECM
+interface as link detected:
+
+```
+# ethtool enp0s20u9u4
+Settings for enp0s20u9u4:
+        Current message level: 0x00000007 (7)
+                               drv probe link
+        Link detected: yes
+```

tests/pkg_tinyusb_netdev/main.c

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+/*
+ * Copyright (C) 2019 Koen Zandberg <koen@bergzand.net>
+ *               2022 Gunar Schorcht <gunar@schorcht.net>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ * @brief       Test application for the tinyUSB netdev
+ *
+ * @author      Koen Zandberg <koen@bergzand.net>
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "shell.h"
+#include "msg.h"
+
+#define MAIN_QUEUE_SIZE     (8U)
+static msg_t _main_msg_queue[MAIN_QUEUE_SIZE];
+
+int main(void)
+{
+    /* we need a message queue for the thread running the shell in order to
+     * receive potentially fast incoming networking packets */
+    msg_init_queue(_main_msg_queue, MAIN_QUEUE_SIZE);
+    puts("Test application for the tinyUSB net device interface\n");
+    puts("This test pulls in parts of the GNRC network stack, use the\n"
+         "provided shell commands (i.e. ifconfig, ping) to interact with\n"
+         "the tinyUSB based network interface.\n");
+
+    /* start shell */
+    puts("Starting the shell now...");
+    char line_buf[SHELL_DEFAULT_BUFSIZE];
+    shell_run(NULL, line_buf, SHELL_DEFAULT_BUFSIZE);
+
+    /* should be never reached */
+    return 0;
+}