Improve usage of std::move and const references parameters

Accomplished using `run-clang-tidy` with `performance-move-const-arg,performance-unnecessary-value-param,modernize-pass-by-value`.

Changed arguments to const references, removed them where inappropriate (e.g. sink parameters). Same with std::move.

Manually reviewed each change to make sure that it makes sense, and do something more appropriate if possible.

Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp

@@ -23,6 +23,7 @@
 #include <QTextBrowser>
 
 #include <algorithm>
+#include <utility>
 
 #ifdef HAS_LIBMGBA
 #include <fmt/ranges.h>
@@ -500,7 +501,7 @@ void NetPlayDialog::reject()
 
 void NetPlayDialog::show(std::string nickname, bool use_traversal)
 {
-  m_nickname = nickname;
+  m_nickname = std::move(nickname);
   m_use_traversal = use_traversal;
   m_buffer_size = 0;
   m_old_player_count = 0;