[SRP Framework] Update buginfo files and code owners for the areas

Update .buginfo for areas:
- SRP Workflow
- Graphics Tools
- SRP Architecture & API

Amending the Codeowner file with same informations using handles
- [unity/srp-workflows](https://github.cds.internal.unity3d.com/orgs/unity/teams/srp-workflows)
- [graphics-tools](https://github.cds.internal.unity3d.com/orgs/unity/teams/graphics-tools)
- [srp-architecture-api](https://github.cds.internal.unity3d.com/orgs/unity/teams/srp-architecture-api)

Author: alex-vazquez-unity3d

Packages/com.unity.render-pipelines.core/.buginfo

@@ -1 +1,8 @@
-area: RP Workflow
+rule1:
+  area: SRP Architecture & API
+
+rule2:
+  when:
+    path:
+      - ^.*SpeedTree.*$
+  area: Environment Effects

Packages/com.unity.render-pipelines.core/Editor/.buginfo

@@ -1,8 +1,24 @@
 rule1:
-  area: RP Workflow
+  area: SRP Architecture & API
 
 rule2:
   when:
     path:
       - ^.*SpeedTree.*$
-  area: Weta Real Time
+  area: Environment Effects
+
+rule3:
+  when:
+    path:
+      - ^.*Camera.*$
+      - ^.*ContextualMenuDispatcher.*$
+      - ^.*CoreRenderPipelinePreferences.*$
+      - ^.*InspectorCurveEditor.*$
+      - ^.*RemoveAdditionalDataUtils.*$
+  area: SRP Workflow
+  
+rule4:
+  when:
+    path:
+      - ^.*Upgrader.*$
+  area: Graphics Tools

Packages/com.unity.render-pipelines.core/Editor/Analytics/.buginfo

@@ -0,0 +1 @@
+area: Graphics Tools

Packages/com.unity.render-pipelines.core/Editor/Camera/.buginfo

@@ -0,0 +1 @@
+area: SRP Workflow

Packages/com.unity.render-pipelines.core/Editor/CommandBuffers/.buginfo

@@ -0,0 +1 @@
+area: Graphics Tools

Packages/com.unity.render-pipelines.core/Editor/CustomRenderTexture/.buginfo

@@ -0,0 +1 @@
+area: SRP Workflow

Packages/com.unity.render-pipelines.core/Editor/Debugging/.buginfo

@@ -0,0 +1 @@
+area: SRP Workflow

Packages/com.unity.render-pipelines.core/Editor/Gizmo/.buginfo

@@ -1,9 +1 @@
-rule1:
-  area: RP Workflow
-
-rule2:
-  when:
-    path:
-      - ^.*IES.*$
-      - ^.*ProbeVolume.*$
-  area: HD RP
+area: Lighting