test/e2e: use custom network config v2

Adds two custom config dirs to tests that were missed in
commit dc9a65e348.

Fixes #17946 (hopefully finally)

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/e2e/prune_test.go

@@ -228,6 +228,7 @@ var _ = Describe("Podman prune", func() {
 	})
 
 	It("podman system prune pods", func() {
+		useCustomNetworkDir(podmanTest, tempdir)
 		session := podmanTest.Podman([]string{"pod", "create"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))