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

[Nathan Gauër via llvm-commits]

================
@@ -3721,7 +3722,7 @@ bool SPIRVInstructionSelector::selectAllocaArray(Register ResVReg,
                  .addUse(GR.getSPIRVTypeID(ResType))
                  .addUse(I.getOperand(2).getReg())
                  .constrainAllUses(TII, TRI, RBI);
-  if (!STI.isVulkanEnv()) {
+  if (!STI.isShaderEnv()) {
----------------
Keenuts wrote:

```suggestion
  if (STI.isKernelEnv()) {
```

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