archive KIO: register also as handler for zstd-compressed tars

Needs KArchive >= 5.82, which matches min requirements
1 job for master in 4 minutes and 48 seconds (queued for 92 minutes and 50 seconds)
Status Name Job ID Coverage
  Build
passed linux kf5-qt5 qt5.15 #116172

00:04:48

4.0%