[C#] Support for std::vector<std::unique_ptr<TYPE>>

[leeroyka]

Vector generation doesn't fully use move semantics for std::unique_ptr

swig 4.3.0 (7800b52)
I tried to compile this code

%include <std_vector.i>
%include <std_unique_ptr.i>

%unique_ptr(Test);

%inline %{
class Test
{
public:
    Test() = default;
};
%}

%template(TestVector) std::vector<std::unique_ptr<Test>>;

%inline %{
#include <memory>
#include <vector>

std::vector<std::unique_ptr<Test>> createVector() {
    std::vector<std::unique_ptr<Test>> vec;
    return vec;
}
%}

error: use of deleted function ‘std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = Test; _Dp = std::default_delete<Test>]’
  461 |           return (*self)[index];
error: use of deleted function ‘std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = Test; _Dp = std::default_delete<Test>]’
  473 |           (*self)[index] = val;
required from here
/usr/include/c++/9/ext/new_allocator.h:146:4: error: use of deleted function ‘std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = Test; _Dp = std::default_delete<Test>]’
  146 |  { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }