fix: only consider package links for sdist and bdist_wheels (#5767)

Only follow and lock links for packages of type `sdist` or `bdist_wheel`
in PyPi repository.

Closes: https://github.com/python-poetry/poetry/issues/3649
Closes: https://github.com/python-poetry/poetry/issues/4903

(This is a port of https://github.com/python-poetry/poetry/pull/3656.)