Integrate llvm/llvm-project@8071d279 (#21669)

Reverts:
* llvm/llvm-project@d15280894bd:
llvm/llvm-project#147961

Issue: #21349

Author: kuhar

compiler/plugins/target/WebGPUSPIRV/test/smoketest.mlir

@@ -5,7 +5,7 @@ module attributes {
   hal.device.targets = [
     #hal.device.target<"webgpu", [
       #hal.executable.target<"webgpu-spirv", "webgpu-wgsl-fb", {
-        iree_codegen.target_info = #iree_gpu.target<arch = "", features = "spirv:v1.0,cap:Shader,ext:SPV_KHR_storage_buffer_storage_class", wgp = <
+        iree_codegen.target_info = #iree_gpu.target<arch = "", features = "spirv:v1.0,cap:Shader,ext:SPV_KHR_storage_buffer_storage_class,ext:SPV_KHR_non_semantic_info", wgp = <
           compute = fp32|int32, storage = b32, subgroup = none, subgroup_size_choices = [32],
           max_workgroup_sizes = [128, 128, 64], max_thread_count_per_workgroup = 128, max_workgroup_memory_bytes = 16384,
           max_workgroup_counts = [65535, 65535, 65535]>>

compiler/src/iree/compiler/Codegen/Dialect/GPU/TargetUtils/KnownTargets.cpp

@@ -966,10 +966,10 @@ TargetAttr getWebGPUTargetDetails(MLIRContext *context) {
       {0xffff, 0xffff, 0xffff}};
   // clang-format on
 
-  return createTargetAttr(
-      {&wgp, nullptr}, /*arch=*/"",
-      "spirv:v1.0,cap:Shader,ext:SPV_KHR_storage_buffer_storage_class",
-      context);
+  return createTargetAttr({&wgp, nullptr}, /*arch=*/"",
+                          "spirv:v1.0,cap:Shader,ext:SPV_KHR_storage_buffer_"
+                          "storage_class,ext:SPV_KHR_non_semantic_info",
+                          context);
 }
 
 TargetAttr getFullTarget(StringRef targetAPI, StringRef aliasTarget,