Disable unstable VFX tests

Author: AngelaDematte

Tests/SRPTests/Projects/VisualEffectGraph_HDRP/Assets/Tests/HDRP_VisualEffectsGraph_GraphicsTests.cs

@@ -30,6 +30,8 @@ public class VFXGraphicsTests
         [IgnoreGraphicsTest("39_SmokeLighting_APV", "Too many bindings when using APVs", runtimePlatforms: new RuntimePlatform[] { RuntimePlatform.Switch })]
         [IgnoreGraphicsTest("102_ShadergraphShadow", "See UUM-96202", runtimePlatforms: new RuntimePlatform[] { RuntimePlatform.Switch })]
         [IgnoreGraphicsTest("015_FixedTime", "See UUM-109089", runtimePlatforms: new RuntimePlatform[] { RuntimePlatform.Switch })]
+        [IgnoreGraphicsTest("DistortionTest", "Unstable: https://jira.unity3d.com/browse/UUM-134091")]
+        [IgnoreGraphicsTest("HDRP_VolumetricOutput", "Unstable: https://jira.unity3d.com/browse/UUM-134091")]
         [IgnoreGraphicsTest("Repro_SampleGradient_Branch_Instancing", "Compute shader ([Repro_SampleGradient_Branch_Instancing] [Minimal] Update Particles): Property (Repro_SampleGradient_Branch_Instancing_Buffer) at kernel index (0) is not set")]
         [IgnoreGraphicsTest("Empty", "No reference images provided")]
         [IgnoreGraphicsTest("Empty_With_Camera", "No reference images provided")]