Atom Level component test support in editor_entity_utils.py and tests for level components (#6082)

* Level component helper and test cases for Atom Level components which currently crash

Signed-off-by: Scott Murray <scottmur@amazon.com>

* moved a close paren to end of previous line to match existing style

Signed-off-by: Scott Murray <scottmur@amazon.com>

* adding a forgotten import

Signed-off-by: Scott Murray <scottmur@amazon.com>

* minor refactor and prep for adding back the Display Mapper Game component test

Signed-off-by: Scott Murray <scottmur@amazon.com>

* putting Game compoenent Display Mapper test back with addition of setting property Enabled to true

Signed-off-by: Scott Murray <scottmur@amazon.com>

* typo in line fixed Test. bocomes Tests.

Signed-off-by: Scott Murray <scottmur@amazon.com>

AutomatedTesting/Gem/PythonTests/Atom/atom_utils/atom_constants.py

@@ -18,6 +18,13 @@ LIGHT_TYPES = {
     'simple_spot': 7,
 }
 
+# Qualiity Level settings for Diffuse Global Illumination level component
+GLOBAL_ILLUMINATION_QUALITY = {
+    'Low': 0,
+    'Medium': 1,
+    'High': 2,
+}
+
 
 class AtomComponentProperties:
     """
@@ -116,6 +123,21 @@ class AtomComponentProperties:
         }
         return properties[property]
 
+    @staticmethod
+    def diffuse_global_illumination(property: str = 'name') -> str:
+        """
+        Diffuse Global Illumination level component properties.
+        Controls global settings for Diffuse Probe Grid components.
+          - 'Quality Level' from atom_constants.py GLOBAL_ILLUMINATION_QUALITY
+        :param property: From the last element of the property tree path. Default 'name' for component name string.
+        :return: Full property path OR component name if no property specified.
+        """
+        properties = {
+            'name': 'Diffuse Global Illumination',
+            'Quality Level': 'Controller|Configuration|Quality Level'
+        }
+        return properties[property]
+
     @staticmethod
     def diffuse_probe_grid(property: str = 'name') -> str:
         """
@@ -148,7 +170,8 @@ class AtomComponentProperties:
     @staticmethod
     def display_mapper(property: str = 'name') -> str:
         """
-        Display Mapper component properties.
+        Display Mapper level component properties.
+          - 'Enable LDR color grading LUT' toggles the use of LDR color grading LUT
           - 'LDR color Grading LUT' is the Low Definition Range (LDR) color grading for Look-up Textures (LUT) which is
             an Asset.id value corresponding to a lighting asset file.
         :param property: From the last element of the property tree path. Default 'name' for component name string.
@@ -156,6 +179,7 @@ class AtomComponentProperties:
         """
         properties = {
             'name': 'Display Mapper',
+            'Enable LDR color grading LUT': 'Controller|Configuration|Enable LDR color grading LUT',
             'LDR color Grading LUT': 'Controller|Configuration|LDR color Grading LUT',
         }
         return properties[property]