Allow using vcpkg for all Windows targets, and use find_package

[micolous]

vcpkg-rs doesn't support -pc-windows-gnu (mingw) yet, but its integration tests will try to build libz-sys, which currently prevents using vcpkg for non-msvc targets.

This change should have no effect for libz-sys right now, but unblocks that work.

This also switches from vcpkg::lib_names/probe to vcpkg::find_package, which reliably gets the library names. Previously, this had hard coded assumptions using MSVC-style library naming (no lib prefix).

Addendum to release notes: vcpkg won't work for non-MSVC Windows targets until mcgoo/vcpkg-rs#52 is merged and there's a release of vcpkg-rs with that PR.

[Byron]

Thanks a lot for tackling this!

To me this looks like an improvement all around as it reduces special cases that, at least according to CI, aren't needed (anymore).

I'd merge this, but would like another reviewer for good measure.

[Byron]

I have rebased this PR onto main which contains additional tests against flate2 which gives me all the confidence I need to merge this PR once CI is green.

[micolous]

Thanks!

One addendum to the release notes for v1.1.10: this won't actually build for non-MSVC targets until mcgoo/vcpkg-rs#52 is merged, and there's a new release of vcpkg-rs with it.

This PR just lays some of the ground work, and a release means I won't have to pin libz-sys in vcpkg-rs' CI any more 🎉

[Byron]

Thanks for the clarification! I added the amendment to the release notes, and am looking forward to seeing the vcpkg-rs improvements merged. Thanks for driving this!