Revert "Build OpenSSL from upstream and drop v1"

The KDAB repository has been updated with support for 16 kB page size. We need the OpenSSL libraries with the _3 suffix for Qt as provided there and described here:
https://doc.qt.io/qt-6/android-openssl-support.html

This reverts commit f69da5a  and 8a611a8.

CI: build for all recent NDK versions

Make GitHub project release tag detection more robust

CI: update GitHub actions

gnustep-base: use default branch

CI: fix prerelease artifact upload