Integration tests conditionally pull

If images aren't present, pull them.
Also fixes the expected responses

integration/llm_image_test.go

@@ -30,7 +30,7 @@ func TestIntegrationMultimodal(t *testing.T) {
 	}
 
 	resp := "the ollamas"
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*60)
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
 	defer cancel()
 	GenerateTestHelper(ctx, t, &http.Client{}, req, []string{resp})
 }