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

[Nathan Gauër via llvm-commits]

================
@@ -319,7 +342,7 @@ bool SPIRVCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
           buildOpDecorate(VRegs[i][0], MIRBuilder,
                           SPIRV::Decoration::MaxByteOffset, {DerefBytes});
       }
-      if (Arg.hasAttribute(Attribute::Alignment) && !ST->isVulkanEnv()) {
+      if (Arg.hasAttribute(Attribute::Alignment) && !ST->isShaderEnv()) {
----------------
Keenuts wrote:

```suggestion
      if (Arg.hasAttribute(Attribute::Alignment) && ST->isKernelEnv()) {
```

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