ci: use correct container engine for test_tesseract_serve_interop (#328)

Currently, the test uses a literal `docker` command to setup the
network. If an alternative container (such as `podman` is used) it
doesn't seem to be guaranteed that it can see this same network. (Led to
failing tests in #324 when trying to run without setting `DOCKER_HOST`)

Author: jpbrodrick89

tests/endtoend_tests/test_endtoend.py

@@ -20,6 +20,7 @@
 
 from tesseract_core.sdk.cli import AVAILABLE_RECIPES, app
 from tesseract_core.sdk.config import get_config
+from tesseract_core.sdk.docker_client import _get_docker_executable
 
 
 @pytest.fixture(scope="module")
@@ -625,9 +626,11 @@ def test_tesseract_serve_interop(
 ):
     cli_runner = CliRunner(mix_stderr=False)
 
+    docker = _get_docker_executable()
+
     # Network create using subprocess
     subprocess.run(
-        ["docker", "network", "create", dummy_network_name],
+        [*docker, "network", "create", dummy_network_name],
         check=True,
     )
     docker_cleanup["networks"].append(dummy_network_name)