Win32: skip building OpenSSL tests to conserve time and space. When building OpenSSL 1.1.1b, as used for win32 builds, with tests it takes about twice as long and near ~1GB of additional disk space. Using "no-tests" OpenSSL configuration option allows to skip them. Since such an option is supported since OpenSSL 1.1.1 only, it is residing here and not in configure.