Disable c-ares tools to fix install error

The c-ares tools (ahost, adig, acountry) are not needed and cause
install errors when the tools aren't built but the install script
tries to install them.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: lsk567

third-party/grpc/grpc.cmake

@@ -32,6 +32,9 @@ function(add_grpc)
   set(gRPC_PROTOBUF_PROVIDER "package" CACHE STRING "" FORCE)
   set(gRPC_ZLIB_PROVIDER "package" CACHE STRING "" FORCE)
 
+  # Disable c-ares tools (ahost, adig, acountry) - not needed and causes install errors
+  set(CARES_BUILD_TOOLS OFF CACHE BOOL "" FORCE)
+
   FetchContent_Declare(
     gRPC
     GIT_REPOSITORY https://github.com/grpc/grpc