Enable picotool reset_interface functionality

[Poofjunior]

In our local copy of usb_descriptors.c, it is not sufficient to set
#define PICO_STDIO_USB_ENABLE_RESET_VIA_VENDOR_INTERFACE (1).

What I'm seeing by setting the #define statement is that lsusb will show that a Reset interface descriptor does indeed exist, but the device hangs when we try to do anything with it.

That's most likely(?) because the pico-sdk's reset_interface.c is not being populated if we link to tinyusb_device in our CMakeLists.txt. We may need to make a local copy of the callback functions if we want to be able to use picotool (i.e: to reset the device from the PC without physically touching the BOOTSEL button).

Paste of lsusb output with Reset interface descriptor info shown below:

    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      1 
      iInterface              5 Reset

References

• Possibly related: No way to use USB serial when tinyUSB library included