Add vk_ray_trace_indirect_scissor sample

ray_tracing_indirect_scissor/shaders/lanternShadowLantern.rchit

@@ -0,0 +1,18 @@
+#version 460
+#extension GL_EXT_ray_tracing : require
+#extension GL_GOOGLE_include_directive : enable
+#include "raycommon.glsl"
+
+// During a lantern pass, this closest hit shader is invoked when
+// shadow rays (rays towards lantern) hit a lantern. Report back
+// which lantern was hit.
+
+// clang-format off
+layout(location = 2) rayPayloadInEXT int hitLanternInstance;
+
+// clang-format on
+
+void main()
+{
+  hitLanternInstance = gl_InstanceCustomIndexEXT;
+}