Don't use designated initializers in QueryPool.cpp

Summary: This is a c++20 feature, but not all clients are on c++20.

Differential Revision: D70933388

Author: SamGondelman

backends/vulkan/runtime/vk_api/QueryPool.cpp

@@ -185,16 +185,16 @@ std::vector<ShaderResult> QueryPool::get_shader_timestamp_data() {
   std::vector<ShaderResult> shader_result;
   for (ShaderDuration& entry : shader_durations_) {
     shader_result.push_back(ShaderResult{
-        .kernel_name = entry.kernel_name,
-        .dispatch_id = entry.dispatch_id,
-        .start_time_ns = entry.start_time_ns,
-        .end_time_ns = entry.end_time_ns,
-        .metadata = ShaderMetadata{
-            .global_workgroup_size =
+        /* .kernel_name = */ entry.kernel_name,
+        /* .dispatch_id = */ entry.dispatch_id,
+        /* .start_time_ns = */ entry.start_time_ns,
+        /* .end_time_ns = */ entry.end_time_ns,
+        /* .metadata = */ ShaderMetadata{
+            /* .global_workgroup_size = */
                 {entry.global_workgroup_size.width,
                  entry.global_workgroup_size.height,
                  entry.global_workgroup_size.depth},
-            .local_workgroup_size =
+            /* .local_workgroup_size = */
                 {entry.local_workgroup_size.width,
                  entry.local_workgroup_size.height,
                  entry.local_workgroup_size.depth},