Add debug config test and restructure

The code argument imports the provided file. If it adds item to the
registry, that affects global state, which CliRunner doesn't isolate.
Since there's no standard way to remove things from the registry, this
instead uses subprocess.run to run commands.

spacy/tests/test_cli_app.py

@@ -1,6 +1,7 @@
 import os
 from pathlib import Path
 import pytest
+import subprocess
 from typer.testing import CliRunner
 
 import spacy
@@ -199,14 +200,47 @@ def noop_config():
         yield cfg
 
 
-def test_multi_code_debug_data(code_paths, data_paths, noop_config):
+def test_multi_code_debug_config(code_paths, data_paths, noop_config):
     # check that it fails without the code arg
-    result = CliRunner().invoke(app, ["debug", "data", str(noop_config), *data_paths])
-    assert result.exit_code == 1
+    result = subprocess.run(
+        ["python", "-m", "spacy", "debug", "config", str(noop_config), *data_paths]
+    )
+    assert result.returncode == 1
 
     # check that it succeeds with the code arg
-    code_arg = ["--code", ",".join([str(pp) for pp in code_paths])]
-    result = CliRunner().invoke(
-        app, ["debug", "data", str(noop_config), *data_paths, *code_paths]
+    result = subprocess.run(
+        [
+            "python",
+            "-m",
+            "spacy",
+            "debug",
+            "config",
+            str(noop_config),
+            *data_paths,
+            *code_paths,
+        ]
     )
-    assert result.exit_code == 0
+    assert result.returncode == 0
+
+
+def test_multi_code_debug_data(code_paths, data_paths, noop_config):
+    # check that it fails without the code arg
+    result = subprocess.run(
+        ["python", "-m", "spacy", "debug", "data", str(noop_config), *data_paths]
+    )
+    assert result.returncode == 1
+
+    # check that it succeeds with the code arg
+    result = subprocess.run(
+        [
+            "python",
+            "-m",
+            "spacy",
+            "debug",
+            "data",
+            str(noop_config),
+            *data_paths,
+            *code_paths,
+        ]
+    )
+    assert result.returncode == 0