[common] Use std::make_unique_for_overwrite<T> in ScratchBuffer, remove polyfill (#4432)

Original `make_unique_for_overwrite.h` is well defined acc. to standard https://en.cppreference.com/cpp/memory/unique_ptr/make_unique, but by now most libc++ supports the function, so no need for polyfill.

Test that this didn't break anything (for example, Megaman game that has video at the start), or anything using VIC/IPC.

Signed-off-by: lizzie <lizzie@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4432
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/core/file_sys/vfs/vfs_real.cpp

@@ -109,8 +109,7 @@ VirtualFile RealVfsFilesystem::OpenFileFromEntry(std::string_view path_, std::op
     auto reference = std::make_unique<FileReference>();
     this->InsertReferenceIntoListLocked(*reference);
 
-    auto file = std::shared_ptr<RealVfsFile>(
-        new RealVfsFile(*this, std::move(reference), path, perms, size, std::move(parent_path)));
+    auto file = std::make_shared<RealVfsFile>(*this, std::move(reference), path, perms, size, std::move(parent_path));
     cache[path] = file;
 
     return file;
@@ -177,7 +176,7 @@ bool RealVfsFilesystem::DeleteFile(std::string_view path_) {
 
 VirtualDir RealVfsFilesystem::OpenDirectory(std::string_view path_, OpenMode perms) {
     const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
-    return std::shared_ptr<RealVfsDirectory>(new RealVfsDirectory(*this, path, perms));
+    return std::make_shared<RealVfsDirectory>(*this, path, perms);
 }
 
 VirtualDir RealVfsFilesystem::CreateDirectory(std::string_view path_, OpenMode perms) {
@@ -185,7 +184,7 @@ VirtualDir RealVfsFilesystem::CreateDirectory(std::string_view path_, OpenMode p
     if (!FS::CreateDirs(path)) {
         return nullptr;
     }
-    return std::shared_ptr<RealVfsDirectory>(new RealVfsDirectory(*this, path, perms));
+    return std::make_shared<RealVfsDirectory>(*this, path, perms);
 }
 
 VirtualDir RealVfsFilesystem::CopyDirectory(std::string_view old_path_,

src/core/file_sys/vfs/vfs_real.h

@@ -82,6 +82,9 @@ class RealVfsFile : public VfsFile {
     friend class RealVfsFilesystem;
 
 public:
+    RealVfsFile(RealVfsFilesystem& base, std::unique_ptr<FileReference> reference,
+                const std::string& path, OpenMode perms = OpenMode::Read,
+                std::optional<u64> size = {}, std::optional<std::string> parent_path = {});
     ~RealVfsFile() override;
 
     std::string GetName() const override;
@@ -95,9 +98,6 @@ public:
     bool Rename(std::string_view name) override;
 
 private:
-    RealVfsFile(RealVfsFilesystem& base, std::unique_ptr<FileReference> reference,
-                const std::string& path, OpenMode perms = OpenMode::Read,
-                std::optional<u64> size = {}, std::optional<std::string> parent_path = {});
 
     RealVfsFilesystem& base;
     std::unique_ptr<FileReference> reference;
@@ -113,6 +113,8 @@ class RealVfsDirectory : public VfsDirectory {
     friend class RealVfsFilesystem;
 
 public:
+    RealVfsDirectory(RealVfsFilesystem& base, const std::string& path,
+                     OpenMode perms = OpenMode::Read);
     ~RealVfsDirectory() override;
 
     VirtualFile GetFileRelative(std::string_view relative_path) const override;
@@ -138,9 +140,6 @@ public:
     std::map<std::string, VfsEntryType, std::less<>> GetEntries() const override;
 
 private:
-    RealVfsDirectory(RealVfsFilesystem& base, const std::string& path,
-                     OpenMode perms = OpenMode::Read);
-
     template <typename T, typename R>
     std::vector<std::shared_ptr<R>> IterateEntries() const;
 

src/core/hle/service/psc/ovln/receiver_service.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
@@ -24,7 +24,7 @@ IReceiverService::~IReceiverService() = default;
 
 Result IReceiverService::OpenReceiver(Out<SharedPointer<IReceiver>> out_receiver) {
     LOG_DEBUG(Service_PSC, "called");
-    *out_receiver = std::shared_ptr<IReceiver>(new IReceiver(system));
+    *out_receiver = std::make_shared<IReceiver>(system);
     R_SUCCEED();
 }