[llvm] [Offload][NFC] use unique ptrs for platforms (PR #160888)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- offload/liboffload/src/OffloadImpl.cpp
``````````

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``````````diff
diff --git a/offload/liboffload/src/OffloadImpl.cpp b/offload/liboffload/src/OffloadImpl.cpp
index 70fc97c15..051882da7 100644
--- a/offload/liboffload/src/OffloadImpl.cpp
+++ b/offload/liboffload/src/OffloadImpl.cpp
@@ -118,17 +118,16 @@ struct ol_device_impl_t {
   }
 };
 
-
 llvm::Error ol_platform_impl_t::destroy() {
-    llvm::Error Result = Plugin::success();
-    for (auto &D : Devices)
-      if (auto Err = D->destroy())
-        Result = llvm::joinErrors(std::move(Result), std::move(Err));
+  llvm::Error Result = Plugin::success();
+  for (auto &D : Devices)
+    if (auto Err = D->destroy())
+      Result = llvm::joinErrors(std::move(Result), std::move(Err));
 
-    if (auto Res = Plugin->deinit())
-      Result = llvm::joinErrors(std::move(Result), std::move(Res));
+  if (auto Res = Plugin->deinit())
+    Result = llvm::joinErrors(std::move(Result), std::move(Res));
 
-    return Result;
+  return Result;
 }
 
 struct ol_queue_impl_t {
@@ -280,8 +279,8 @@ Error initPlugins(OffloadContext &Context) {
   // Add the special host device
   auto &HostPlatform = Context.Platforms.emplace_back(
       std::make_unique<ol_platform_impl_t>(nullptr, OL_PLATFORM_BACKEND_HOST));
-  HostPlatform->Devices.emplace_back(
-      std::make_unique<ol_device_impl_t>(-1, nullptr, *HostPlatform, InfoTreeNode{}));
+  HostPlatform->Devices.emplace_back(std::make_unique<ol_device_impl_t>(
+      -1, nullptr, *HostPlatform, InfoTreeNode{}));
 
   Context.TracingEnabled = std::getenv("OFFLOAD_TRACE");
   Context.ValidationEnabled = !std::getenv("OFFLOAD_DISABLE_VALIDATION");

``````````

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https://github.com/llvm/llvm-project/pull/160888