boost::has_left_shift does not work with containers

The following example is a minimal reproduction of this issue:

```cpp
#define BOOST_TEST_MODULE ExampleTestModule
#include
#include

inline std::ostream& operator<<(std::ostream& os, const std::pair& _) {
os << "Pairwise operator called!" << std::endl;
return os;
}

BOOST_STATIC_ASSERT(boost::has_left_shift&>::value);

// If you comment out the above static assertion, the code compiles and this
// test case prints, as expected "Pairwise operator called!"
BOOST_AUTO_TEST_CASE(test_case1)
{
std::pair pair;
std::cout << pair;
}
```

Compiling with gcc 14.2.1 results in:

```
ex.cpp:10:87: error: static assertion failed: boost::has_left_shift&>::value
10 | BOOST_STATIC_ASSERT(boost::has_left_shift&>::value);
```

I have similar results in clang 18.1.6:

```
ex.cpp:10:21: error: static assertion failed due to requirement 'boost::has_left_shift> &, const std::pair &, boost::binary_op_detail::dont_care>::value': boost::has_left_shift&>::value
10 | BOOST_STATIC_ASSERT(boost::has_left_shift&>::value);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/boost/static_assert.hpp:71:55: note: expanded from macro 'BOOST_STATIC_ASSERT'
71 | # define BOOST_STATIC_ASSERT( ... ) static_assert(__VA_ARGS__, #__VA_ARGS__)
|
```

The same happens if you use a `std::vector` instead.