[VFX][Fix][2021.2] Update test and reference images for HDRP Decals

TestProjects/VisualEffectGraph_HDRP/Assets/AllTests/VFXTests/GraphicsTests/37_DecalsHDRP/37_DecalsHDRP.unity

@@ -237,6 +237,7 @@ MonoBehaviour:
   taaAntiFlicker: 0.5
   taaMotionVectorRejection: 0
   taaAntiHistoryRinging: 0
+  taaBaseBlendFactor: 0.875
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     m_ShutterSpeed: 0.005
@@ -842,7 +843,6 @@ Transform:
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   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
@@ -915,103 +915,6 @@ PrefabInstance:
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     m_RemovedComponents: []
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-  - component: {fileID: 1864588317}
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-  m_LocalPosition: {x: 0, y: 0, z: 0}
-  m_LocalScale: {x: 10, y: 0.099999994, z: 10}
-  m_ConstrainProportionsScale: 1
-  m_Children: []
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-  m_RootOrder: 3
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!65 &1864588317
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-  serializedVersion: 2
-  m_Size: {x: 1, y: 1, z: 1}
-  m_Center: {x: 0, y: 0, z: 0}
---- !u!23 &1864588318
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-  m_LightProbeUsage: 1
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-  m_ScaleInLightmap: 1
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-  m_IgnoreNormalsForChartDetection: 0
-  m_ImportantGI: 0
-  m_StitchLightmapSeams: 1
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-  m_MinimumChartSize: 4
-  m_AutoUVMaxDistance: 0.5
-  m_AutoUVMaxAngle: 89
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---- !u!33 &1864588319
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