module_deps: Migrate to standard StepCwdEquals

This test assertion has been upstreamed in http://crrev.com/c/7989352.

Change-Id: I316e5f190108a3192e2efcd23a62945057c346df
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/429154

recipes/module_deps.py

diff --git a/recipes/module_deps.py b/recipes/module_deps.py
index 236af50..dd0847f 100644
--- a/recipes/module_deps.py
+++ b/recipes/module_deps.py
@@ -177,17 +177,6 @@
 def GenTests(
     api: recipe_test_api.RecipeTestApi,
 ) -> Iterator[recipe_test_api.TestData]:
-    def step_cwd_equals(check, step_odict, step_name, expected_cwd):
-        step = step_odict.get(step_name)
-        if check(f'step {step_name} exists', step is not None):
-            actual_cwd = (
-                step.cwd if hasattr(step, 'cwd') else step.get('cwd', '')
-            )
-            check(
-                f'step {step_name} cwd is {expected_cwd} (actual: {actual_cwd})',
-                actual_cwd == expected_cwd,
-            )
-
     def properties(**kwargs: Any) -> recipe_test_api.TestData:
         props = InputProperties(**kwargs)
         props.checkout_options.CopyFrom(api.checkout.git_options())
@@ -343,13 +332,13 @@
         ),
         api.post_check(post_process.MustRun, 'cmake.cmake configure'),
         api.post_check(
-            step_cwd_equals,
+            post_process.StepCwdEquals,
             'cmake.cmake configure',
             '[START_DIR]/co/my_sub_dir',
         ),
         api.post_check(post_process.MustRun, 'cmake.cmake graphviz'),
         api.post_check(
-            step_cwd_equals,
+            post_process.StepCwdEquals,
             'cmake.cmake graphviz',
             '[START_DIR]/co/my_sub_dir/out',
         ),