NvCloth automated tests use default renderer to be more stable and complete (#1850)

Signed-off-by: moraaar <moraaar@amazon.com>

AutomatedTesting/Gem/PythonTests/automatedtesting_shared/base.py

@@ -51,7 +51,7 @@ class TestAutomationBase:
         cls._kill_ly_processes()
 
 
-    def _run_test(self, request, workspace, editor, testcase_module, extra_cmdline_args=[]):
+    def _run_test(self, request, workspace, editor, testcase_module, extra_cmdline_args=[], use_null_renderer=True):
         test_starttime = time.time()
         self.logger = logging.getLogger(__name__)
         errors = []
@@ -89,7 +89,10 @@ class TestAutomationBase:
         editor_starttime = time.time()
         self.logger.debug("Running automated test")
         testcase_module_filepath = self._get_testcase_module_filepath(testcase_module)
-        pycmd = ["--runpythontest", testcase_module_filepath, "-BatchMode", "-autotest_mode", "-rhi=null"] + extra_cmdline_args
+        pycmd = ["--runpythontest", testcase_module_filepath, "-BatchMode", "-autotest_mode"]
+        if use_null_renderer:
+            pycmd += ["-rhi=null"]
+        pycmd += extra_cmdline_args
         editor.args.extend(pycmd) # args are added to the WinLauncher start command
         editor.start(backupFiles = False, launch_ap = False)
         try: