net/py-ripe.atlas.tools: Resolve conflict with dns/c-ares

All copies of the Python script ripe-atlas (atraceroute, asslcert,
aping, antp, ahttp, adig) were removed. Those copies didn't provide any
additional features. The same effect can be achieved by creating shell
aliases referring to the ripe-atlas script.
Additionally, Python 3.11 was added to the declared supported versions.

Probably the upstream is not going to resolve it soon. Since the userbase
is very narrow, and the removed aliases (copies of the original script)
weren't useful, this change seems to be fine.

PR: 285689
MFH: 2025Q2