Moving flaky multiplayer tests into sandbox so they will still be ran nightly, but we can still fix and create new tests

Signed-off-by: Gene Walters <genewalt@amazon.com>

AutomatedTesting/Gem/PythonTests/Multiplayer/CMakeLists.txt

@@ -20,4 +20,17 @@ if(PAL_TRAIT_BUILD_TESTS_SUPPORTED AND PAL_TRAIT_BUILD_HOST_TOOLS)
         COMPONENT
             Multiplayer
     )
+    ly_add_pytest(
+        NAME AutomatedTesting::MultiplayerTests_Sandbox
+        TEST_SUITE sandbox
+        TEST_SERIAL
+        PATH ${CMAKE_CURRENT_LIST_DIR}/TestSuite_Sandbox.py
+        RUNTIME_DEPENDENCIES
+            Legacy::Editor
+            AZ::AssetProcessor
+            AutomatedTesting.Assets
+            AutomatedTesting.ServerLauncher
+        COMPONENT
+            Multiplayer
+    )
 endif()

AutomatedTesting/Gem/PythonTests/Multiplayer/TestSuite_Main.py

@@ -27,7 +27,3 @@ class TestAutomation(TestAutomationBase):
             batch_mode=batch_mode,
             autotest_mode=autotest_mode)
 
-    def test_Multiplayer_AutoComponent_NetworkInput(self, request, workspace, editor, launcher_platform):
-        from .tests import Multiplayer_AutoComponent_NetworkInput as test_module
-        self._run_prefab_test(request, workspace, editor, test_module)
-

AutomatedTesting/Gem/PythonTests/Multiplayer/TestSuite_Sandbox.py

@@ -0,0 +1,35 @@
+"""
+Copyright (c) Contributors to the Open 3D Engine Project.
+For complete copyright and license terms please see the LICENSE at the root of this distribution.
+
+SPDX-License-Identifier: Apache-2.0 OR MIT
+
+"""
+
+# This suite consists of all test cases that are under development and have not been verified yet.
+# Once they are verified, please move them to TestSuite_Active.py
+
+import pytest
+import os
+import sys
+
+
+sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/../automatedtesting_shared')
+
+from base import TestAutomationBase
+
+@pytest.mark.SUITE_sandbox
+@pytest.mark.parametrize("project", ["AutomatedTesting"])
+@pytest.mark.parametrize("launcher_platform", ['windows_editor'])
+class TestAutomation(TestAutomationBase):
+    def _run_prefab_test(self, request, workspace, editor, test_module, batch_mode=True, autotest_mode=True):
+        self._run_test(request, workspace, editor, test_module, 
+            extra_cmdline_args=["--regset=/Amazon/Preferences/EnablePrefabSystem=true"], 
+            batch_mode=batch_mode,
+            autotest_mode=autotest_mode)
+
+    ## Seems to be flaky, need to investigate
+    def test_Multiplayer_AutoComponent_NetworkInput(self, request, workspace, editor, launcher_platform):
+        from .tests import Multiplayer_AutoComponent_NetworkInput as test_module
+        self._run_prefab_test(request, workspace, editor, test_module)
+