[llvm] [SPIRV] Change how to detect OpenCL/Vulkan Env and update tests accordingly. (PR #129689)

[Nathan Gauër via llvm-commits]

================
@@ -982,7 +982,7 @@ SPIRVType *SPIRVGlobalRegistry::getOpTypeStruct(
   Register ResVReg = createTypeVReg(MIRBuilder);
   if (Ty->hasName())
     buildOpName(ResVReg, Ty->getName(), MIRBuilder);
-  if (Ty->isPacked() && !ST.isVulkanEnv())
+  if (Ty->isPacked() && !ST.isShaderEnv())
----------------
Keenuts wrote:

```suggestion
  if (Ty->isPacked() && ST.isKernelEnv())
```

https://github.com/llvm/llvm-project/pull/129689