[HDRP] Fix lens flare screen space and bloom frame settings confusion.

In [this forum post](https://forum.unity.com/threads/disabling-post-processing-effects-in-the-default-volume-profile.1545362/#post-9891525), a user complained that even if Bloom frame settings was set to false, if there was a screen space lens flare override, we "reactivated" the bloom pass without the user's knowledge which can be confusing and deceiving. 

Now, SSLF frame settings is now a child of the Bloom frame settings. In addition, there's a warning box directly in the override if any of the frame setting (bloom or SSLF) is set to false preventing the bloom pass to be executed without the users knowledge. 

![image](https://media.github.cds.internal.unity3d.com/user/1764/files/6e522a47-79f2-49fe-aeaf-d9d4166467ef)

In addition, since SSLF writes directly on the bloom buffer and uses the uberpass bloom to be rendered, if bloom intensity is set to zero, it won't render. So in the SSLF override there's now a message warning you that one or more bloom override prevents SSLF to be rendered. 

![image](https://media.github.cds.internal.unity3d.com/user/1764/files/16320f54-ad23-4338-a5c7-9e4f0788db65)

Lastly, I took the opportunity with this PR to add the frame settings check wherever it made sense in the current override to avoid further users confusions (cf [commit](https://github.cds.internal.unity3d.com/unity/unity/pull/51061/commits/32f1369d6710394879f23d2f24f84b73a68710cb)).

Author: remi-chapelain

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/Reflection/HDScreenSpaceReflectionEditor.cs

@@ -188,6 +188,8 @@ void RayTracedReflectionGUI(RayCastingMode tracingMode)
         {
             HDRenderPipelineAsset currentAsset = HDRenderPipeline.currentAsset;
 
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.RayTracing, "RayTracing");
+
             if (RenderPipelineManager.currentPipeline is not HDRenderPipeline { rayTracingSupported: true })
                 HDRenderPipelineUI.DisplayRayTracingSupportBox();
 

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/Reflection/ScreenSpaceRefractionEditor.cs

@@ -17,6 +17,7 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.Refraction, "Refraction");
             PropertyField(m_ScreenFadeDistance, k_ScreenFadeDistance);
         }
 

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/ScreenSpaceAmbientOcclusionEditor.cs

@@ -101,6 +101,7 @@ private static class Styles
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.SSAO, "Screen Space Ambient Occlusion");
             HDRenderPipelineAsset currentAsset = HDRenderPipeline.currentAsset;
             bool notSupported = currentAsset != null && !currentAsset.currentPlatformRenderPipelineSettings.supportSSAO;
             if (notSupported)
@@ -117,6 +118,7 @@ public override void OnInspectorGUI()
 
                 if (m_RayTracing.overrideState.boolValue && m_RayTracing.value.boolValue)
                 {
+                    HDEditorUtils.EnsureFrameSetting(FrameSettingsField.RayTracing, "RayTracing");
                     // If ray tracing is supported display the content of the volume component
                     if (RenderPipelineManager.currentPipeline is not HDRenderPipeline { rayTracingSupported: true })
                         HDRenderPipelineUI.DisplayRayTracingSupportBox();

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/Shadow/ContactShadowsEditor.cs

@@ -40,6 +40,8 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.ContactShadows, "Contact Shadows");
+
             PropertyField(m_Enable, EditorGUIUtility.TrTextContent("State", "When enabled, HDRP processes Contact Shadows for this Volume."));
 
             if (!m_Enable.value.hasMultipleDifferentValues)

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/Shadow/HDShadowSettingsEditor.cs

@@ -45,6 +45,8 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.ShadowMaps, "Shadow Maps");
+
             PropertyField(m_MaxShadowDistance, EditorGUIUtility.TrTextContent("Max Distance", "In Meter"));
 
             EditorGUILayout.Space();

Packages/com.unity.render-pipelines.high-definition/Editor/Lighting/VolumetricClouds/VolumetricCloudsEditor.cs

@@ -507,6 +507,8 @@ bool CloudsShapeUI()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.VolumetricClouds, "Volumetric Clouds");
+
             // This whole editor has nothing to display if the SSR feature is not supported
             HDRenderPipelineAsset currentAsset = HDRenderPipeline.currentAsset;
             bool notSupported = currentAsset != null && !currentAsset.currentPlatformRenderPipelineSettings.supportVolumetricClouds;

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/BloomEditor.cs

@@ -39,6 +39,8 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.Bloom, "Bloom");
+
             base.OnInspectorGUI();
 
             PropertyField(m_Threshold);

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/ChromaticAberrationEditor.cs

@@ -24,6 +24,7 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.ChromaticAberration, "Chromatic Aberration");
             PropertyField(m_SpectralLUT);
             PropertyField(m_Intensity);
 

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/DepthOfFieldEditor.cs

@@ -83,6 +83,8 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.DepthOfField, "Depth Of Field");
+
             PropertyField(m_FocusMode, Styles.k_DepthOfFieldMode);
 
             int mode = m_FocusMode.value.intValue;

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/FilmGrainEditor.cs

@@ -24,6 +24,8 @@ public override void OnEnable()
 
         public override void OnInspectorGUI()
         {
+            HDEditorUtils.EnsureFrameSetting(FrameSettingsField.FilmGrain, "Film Grain");
+
             PropertyField(m_Type);
 
             if (m_Type.value.intValue == (int)FilmGrainLookup.Custom)