[BUG] loopbackNetworkInterface.c lacks of FreeRTOS_ARP.h include

[Nikolay-Po]

Bug
There is compilation error in some circumstances.
In loopbackNetworkInterface.c, at the line 153 the function vARPRefreshCacheEntry() is called. This function belongs to FreeRTOS_ARP.c source and is declared in FreeRTOS_ARP.h
Compilation error is occurring when TCP/IP configuration allows IPv4 and loopback interface usage:

../FreeRTOS/FreeRTOS-Plus-TCP/source/portable/NetworkInterface/loopback/loopbackNetworkInterface.c: In function ‘prvLoopback_Output’:
../FreeRTOS/FreeRTOS-Plus-TCP/source/portable/NetworkInterface/loopback/loopbackNetworkInterface.c:153:21: error: implicit declaration of function ‘vARPRefreshCacheEntry’ [-Wimplicit-function-declaration]
  153 |                     vARPRefreshCacheEntry( pxMACAddress, pxDescriptor->xIPAddress.ulIP_IPv4, pxDescriptor->pxEndPoint );
      |                     ^~~~~~~~~~~~~~~~~~~~~

Target

• I believe the problem may exhibit itself on any target which will use IPv4 interfaces and when loopback interface is enabled.

Host

• Host OS: Debian Linux 12

To Reproduce

• Use project with current TCP stack;
• Enable IPv4 adressing in FreeRTOSIPConfig.h: #define ipconfigUSE_IPv4 1;
• Enable loopback interface in FreeRTOSIPConfig.h: #define ipconfigUSE_LOOPBACK 1;
• Use GCC compiler build from sources after 2023-12-01 (after this GCC commit) with -Wimplicit-function-declaration enabled;
• Try to build FreeRTOS with TCP/IP support;

Expected behavior
A build without of error is expected

Additional context
Usually I'm using most fresh GCC compiler available. Currently it's GCC 15. Therefore, it treats implicit function declaration as an error.

[tony-josi-aws]

Thanks @Nikolay-Po for creating this issue and contributing PR #1290
Closing this as the PR is now merged.