Simplify std::find with Common::Contains

In NandPaths.cpp, the `std::initializer_list<char>` of illegal characters has been turned into a `char[]` (similar to the one in GameList.cpp).

The reverse iteration in ResourcePack.cpp seemed to provide no benefits, and doing without it it seemed to have no ill effects.

Source/Core/DolphinQt/GameList/GameList.cpp

@@ -43,6 +43,7 @@
 #include <QUrl>
 
 #include "Common/CommonPaths.h"
+#include "Common/Contains.h"
 #include "Common/FileUtil.h"
 
 #include "Core/Config/MainSettings.h"
@@ -805,8 +806,7 @@ bool GameList::AddShortcutToDesktop()
   // Sanitize the string by removing all characters that cannot be used in NTFS file names
   std::erase_if(game_name, [](char ch) {
     static constexpr char illegal_characters[] = {'<', '>', ':', '\"', '/', '\\', '|', '?', '*'};
-    return std::find(std::begin(illegal_characters), std::end(illegal_characters), ch) !=
-           std::end(illegal_characters);
+    return Common::Contains(illegal_characters, ch);
   });
 
   std::wstring desktop_path = std::wstring(desktop.get()) + UTF8ToTStr("\\" + game_name + ".lnk");

Source/Core/DolphinQt/NetPlay/ChunkedProgressDialog.cpp

@@ -16,6 +16,7 @@
 #include <QPushButton>
 #include <QVBoxLayout>
 
+#include "Common/Contains.h"
 #include "Core/NetPlayClient.h"
 #include "Core/NetPlayServer.h"
 
@@ -108,7 +109,7 @@ void ChunkedProgressDialog::show(const QString& title, const u64 data_size,
 
   for (const auto* player : client->GetPlayers())
   {
-    if (std::find(players.begin(), players.end(), player->pid) == players.end())
+    if (!Common::Contains(players, player->pid))
       continue;
 
     m_progress_bars[player->pid] = new QProgressBar;

Source/Core/DolphinQt/Settings.cpp

@@ -22,6 +22,7 @@
 #include "AudioCommon/AudioCommon.h"
 
 #include "Common/Config/Config.h"
+#include "Common/Contains.h"
 #include "Common/FileUtil.h"
 #include "Common/StringUtil.h"
 
@@ -296,7 +297,7 @@ void Settings::AddPath(const QString& qpath)
   std::string path = qpath.toStdString();
   std::vector<std::string> paths = Config::GetIsoPaths();
 
-  if (std::find(paths.begin(), paths.end(), path) != paths.end())
+  if (Common::Contains(paths, path))
     return;
 
   paths.emplace_back(path);