Code model doesn't distingwish template partial specializations from primary 
template declarations.

The code example:

template<typename T> struct Pair {
    // ...
};
template<typename T> struct Pair<T*> {
    // ...
};

The end-user effect is as follows: class view shows only one Pair template; when
navigating it goes to partial specialization.

This is similar to defects described in #92138 and #98188, but is different from
both language and implementation point of view. 

Parser creates CSM_TEMPLATE_CLASS_DECLARATION node in the case of template
partial specilaization.