AK+Everywhere: Do not implicitly copy variables in TRY macros

For example, consider cases where we want to propagate errors only in
specific instances:

    auto result = read_data(); // something like ErrorOr<ByteBuffer>
    if (result.is_error() && result.error().code() != EINTR)
        continue;
    auto bytes = TRY(result);

The TRY invocation will currently copy the byte buffer when the
expression (in this case, just a local variable) is stored into
_temporary_result.

This patch binds the expression to a reference to prevent such copies.
In less trival invocations (such as TRY(some_function()), this will
incur only temporary lifetime extensions, i.e. no functional change.

Kernel/Net/Socket.h

@@ -188,7 +188,7 @@ private:
 // This is a special variant of TRY() that also updates the socket's SO_ERROR field on error.
 #define SOCKET_TRY(expression)                                                            \
     ({                                                                                    \
-        auto result = (expression);                                                       \
+        auto&& result = (expression);                                                     \
         if (result.is_error())                                                            \
             return set_so_error(result.release_error());                                  \
         static_assert(!::AK::Detail::IsLvalueReference<decltype(result.release_value())>, \