Reenable NvCloth atom automated tests in AutomatedTesting project

- Added NvCloth gem to AutomatedTesting project.
- Fixed cloth test levels using atom components.
- Updated and enabled cloth tests. They are marked as xfail for now until they properly work with atom null renderer.
- Fixed crash when runnnig editor with null renderer on a level with Actor component.
- Improved chicken asset and slice used in NvCloth gem.

AutomatedTesting/Gem/PythonTests/NvCloth/C18977329_NvCloth_AddClothSimulationToMesh.py

@@ -20,7 +20,7 @@ class Tests:
     exit_game_mode               = ("Exited game mode",               "Failed to exit game mode")
 # fmt: on
 
-def run():
+def C18977329_NvCloth_AddClothSimulationToMesh():
     """
     Summary:
     Load level with Entity having Mesh and Cloth components already setup. Verify that editor remains stable in Game mode.
@@ -89,4 +89,7 @@ def run():
     helper.close_editor()
 
 if __name__ == "__main__":
-    run()
+    import ImportPathHelper as imports
+    imports.init()
+    from editor_python_test_tools.utils import Report
+    Report.start_test(C18977329_NvCloth_AddClothSimulationToMesh)

AutomatedTesting/Gem/PythonTests/NvCloth/C18977330_NvCloth_AddClothSimulationToActor.py

@@ -20,7 +20,7 @@ class Tests:
     exit_game_mode               = ("Exited game mode",               "Failed to exit game mode")
 # fmt: on
 
-def run():
+def C18977330_NvCloth_AddClothSimulationToActor():
     """
     Summary:
     Load level with Entity having Actor and Cloth components already setup. Verify that editor remains stable in Game mode.
@@ -89,4 +89,7 @@ def run():
     helper.close_editor()
 
 if __name__ == "__main__":
-    run()
+    import ImportPathHelper as imports
+    imports.init()
+    from editor_python_test_tools.utils import Report
+    Report.start_test(C18977330_NvCloth_AddClothSimulationToActor)

AutomatedTesting/Gem/PythonTests/NvCloth/TestSuite_Active.py

@@ -21,14 +21,15 @@ sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/../automatedtesti
 
 from base import TestAutomationBase
 
-@pytest.mark.SUITE_main
 @pytest.mark.parametrize("launcher_platform", ['windows_editor'])
 @pytest.mark.parametrize("project", ["AutomatedTesting"])
 class TestAutomation(TestAutomationBase):
+    @pytest.mark.xfail(reason="Running with atom null renderer is causing this test to fail")
     def test_C18977329_NvCloth_AddClothSimulationToMesh(self, request, workspace, editor, launcher_platform):
         from . import C18977329_NvCloth_AddClothSimulationToMesh as test_module
         self._run_test(request, workspace, editor, test_module)
 
+    @pytest.mark.xfail(reason="Running with atom null renderer is causing this test to fail")
     def test_C18977330_NvCloth_AddClothSimulationToActor(self, request, workspace, editor, launcher_platform):
         from . import C18977330_NvCloth_AddClothSimulationToActor as test_module
         self._run_test(request, workspace, editor, test_module)