Add AST tests for ray tracing shaders

with subgroup touch tests (error and non-error cases)
Currently the subgroup built-ins are NOT giving the correct output.
This is fixed in the next commit.
diff --git a/gtests/AST.FromFile.cpp b/gtests/AST.FromFile.cpp
index 5e79144..b24a4a1 100644
--- a/gtests/AST.FromFile.cpp
+++ b/gtests/AST.FromFile.cpp
@@ -255,6 +255,12 @@
         "glsl.450.subgroupVote.comp",
         "glsl.460.subgroup.mesh",
         "glsl.460.subgroup.task",
+        "glsl.460.subgroup.rahit",
+        "glsl.460.subgroup.rcall",
+        "glsl.460.subgroup.rchit",
+        "glsl.460.subgroup.rgen",
+        "glsl.460.subgroup.rint",
+        "glsl.460.subgroup.rmiss",
         "glsl.es320.subgroup.frag",
         "glsl.es320.subgroup.geom",
         "glsl.es320.subgroup.tesc",