internal/pkg: compare interfaces for host net

An upcoming improvement in the container init makes the current host net check return the same result for both cases. This change

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/exec_test.go

@@ -4,7 +4,9 @@ package pkg_test
 
 import (
 	_ "embed"
+	"encoding/gob"
 	"errors"
+	"net"
 	"os"
 	"os/exec"
 	"slices"
@@ -263,6 +265,27 @@ func newTesttool() (
 			); err != nil {
 				return err
 			}
+
+			if ift, err := net.Interfaces(); err != nil {
+				return err
+			} else {
+				var f *os.File
+				if f, err = os.Create(t.GetWorkDir().Append(
+					"ift",
+				).String()); err != nil {
+					return err
+				} else {
+					err = gob.NewEncoder(f).Encode(ift)
+					closeErr := f.Close()
+					if err != nil {
+						return err
+					}
+					if closeErr != nil {
+						return closeErr
+					}
+				}
+			}
+
 			return os.WriteFile(t.GetWorkDir().Append(
 				"bin",
 				"testtool",