Updates for final Vulkan ray tracing extensions (#2466)

* Fix traceRay/executeCallable to have id instead of constant.

Update to final (non-provisional) SPIR-V capabilities
(includes review feedback)
- Change visibilty of findLinkerObjects.

See merge request GLSL/glslang!78

* Add support for OpConvertUToAccelerationStructureKHR.

GLSL : https://gitlab.khronos.org/GLSL/GLSL/-/merge_requests/60

SPV : https://gitlab.khronos.org/spirv/spirv-extensions/-/merge_requests/182

See merge request GLSL/glslang!77

* Add volatile qualifier to certain builtins for ray tracing.

See merge request GLSL/glslang!81

* make gl_RayTmaxEXT volatile in intersection shader

Vulkan Issue #2268

* Add testing for layouts on SBT

vulkan/vulkan#2230

- no layout specified should be same as std430
- explicitly test std140, std430, scalar layouts

See merge request GLSL/glslang!86

* Support for new opcodes OpIgnoreIntersectionKHR and OpTerminateRayKHR

vulkan/vulkan#2374

Add support for ignoreIntersectionEXT and terminateRayEXT as block
terminator statements.

See merge request GLSL/glslang!87

* Fix code-generation issues with global ray query variables

See merge request GLSL/glslang!88

* update dependencies for spirv-headers and tools

And update mesh shader results

* Fix indeterminate argument ordering

Authored-by: David Neto <dneto@google.com>

Co-authored-by: Ashwin Lele (NVIDIA Corporation) <alele@nvidia.com>
Co-authored-by: Neslisah <Neslisah.Torosdagli@amd.com>

SPIRV/SpvBuilder.h

@@ -357,9 +357,9 @@ public:
     // Generate all the code needed to finish up a function.
     void leaveFunction();
 
-    // Create a discard or terminate-invocation.
-    void makeDiscard();
-    void makeTerminateInvocation();
+    // Create block terminator instruction for certain statements like
+    // discard, terminate-invocation, terminateRayEXT, or ignoreIntersectionEXT
+    void makeStatementTerminator(spv::Op opcode, const char *name);
 
     // Create a global or function local or IO variable.
     Id createVariable(Decoration precision, StorageClass, Id type, const char* name = nullptr,