fix: resolve ambiguous step definition conflict in execution_environment_steps.py

- Renamed 'it should contain' steps to 'the container types should contain' for specificity
- Updated execution_environment.feature to use the new step names
- This fixes the AmbiguousStep error that was preventing unit tests from running

features/steps/execution_environment_steps.py

@@ -342,12 +342,12 @@ def step_import_types(context: Context) -> None:
     context.container_types = CONTAINER_RESOURCE_TYPES
 
 
-@then('it should contain "{value}"')
+@then('the container types should contain "{value}"')
 def step_types_contain(context: Context, value: str) -> None:
     assert value in context.container_types
 
 
-@then('it should not contain "{value}"')
+@then('the container types should not contain "{value}"')
 def step_types_not_contain(context: Context, value: str) -> None:
     assert value not in context.container_types