[Type] Standardize extern template instantiations for vector

[alxbilger]

This PR ensures that the template class vector is generated only once by the compiler for fundamental types such as int, float, std::string etc.

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[fredroy]

Can you do/post benchmarks with/without the explicit instanciations ?
I remember doing this long time ago with base classes like vector, and got some performance regressions.
I think this can prevent the compiler to inline functions, if you dont compile with LTO