Handle OpTerminateInvocation/OpKill for logging GPU-AV errors

https://github.com/KhronosGroup/Vulkan-ValidationLayers/pull/9841 added a `LogError` and a function that looks like

```C++
bool LogErrorPass::IsShaderExiting(const Instruction& inst) const {
return inst.Opcode() == spv::OpReturn || inst.Opcode() == spv::OpReturnValue;
}
```

We need tests and or at least a warning if the user uses `OpTerminateInvocation`/`OpKill` as it might not report errors

Review PR #9841 and the LogErrorPass::IsShaderExiting entry point first; the issue does not name a source file or test. Trace how OpTerminateInvocation and OpKill are handled, then add coverage or a warning showing that these paths do not silently miss errors.

Written by the indexing model from the issue text.