Overhaul physics test organization (#3684)

* Moved files

Signed-off-by: Garcia Ruiz <aljanru@amazon.co.uk>

* Fixes for moved files

Signed-off-by: Garcia Ruiz <aljanru@amazon.co.uk>

* Removed tmp file

Signed-off-by: Garcia Ruiz <aljanru@amazon.co.uk>

Co-authored-by: Garcia Ruiz <aljanru@amazon.co.uk>

AutomatedTesting/Gem/PythonTests/physics/material/AddModifyDelete_Utils.py

@@ -0,0 +1,32 @@
+"""
+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
+"""
+
+import azlmbr.legacy.general as general
+import azlmbr.bus as bus
+import azlmbr.components
+import azlmbr.physics
+
+class Box:
+    def __init__(self, name):
+        self.name = name
+        self.distances = []
+
+    def find(self):
+        self.id = general.find_game_entity(self.name)
+        self.start_position = self.position
+        return self.id.IsValid()
+
+    @property
+    def position(self):
+        return azlmbr.components.TransformBus(bus.Event, "GetWorldTranslation", self.id)
+
+    def is_stationary(self):
+        velocity = azlmbr.physics.RigidBodyRequestBus(bus.Event, "GetLinearVelocity", self.id)
+        return velocity.IsZero()
+
+    def push(self, impulse):
+        azlmbr.physics.RigidBodyRequestBus(bus.Event, "ApplyLinearImpulse", self.id, impulse)