Merge tag 'ovpn-net-20260417' of https://github.com/OpenVPN/ovpn-net-next

Merge tag 'ovpn-net-20260417' of https://github.com/OpenVPN/ovpn-net-next

Antonio Quartulli says:

====================
This batch includes only fixes to the selftest harness:
* switch to TAP test orchestration
* parse slurped notifications as returned by jq -s
* add ovpn_ prefix to helpers and global variables to avoid clashes
* fail test in case of netlink notification mismatch
* add missing kernel config dependencies
* add delay when launching multiple ynl/cli.py listeners

* tag 'ovpn-net-20260417' of https://github.com/OpenVPN/ovpn-net-next:
  selftests: ovpn: serialize YNL listener startup
  selftests: ovpn: align command flow with TAP
  selftests: ovpn: add prefix to helpers and shared variables
  selftests: ovpn: flatten slurped notification JSON before filtering
  selftests: ovpn: fail notification check on mismatch
  selftests: ovpn: add nftables config dependencies for test-mark
====================

Link: https://patch.msgid.link/20260417090305.2775723-1-antonio@openvpn.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>