Description of problem:
dhclient shows unnecessary warning/error

Version-Release number of selected component (if applicable):
rhel93 with dhcp-client-4.4.2-19.b1.el9.s390x

How reproducible:
always

Steps to Reproduce:
1,
ip link add veth-test type veth peer name veth-peer

ip link set veth-test address 02:01:02:03:04:08
ip link set veth-peer address 02:01:02:03:04:09

ip link set dev veth-test up
ip link set dev veth-peer up

ip address add 2600::1/64 dev veth-peer
2,
dnsmasq --interface=veth-peer --enable-ra --dhcp-range=2600::10,2600::20 -R

3,
dhclient -6 -v -nw veth-test
dhclient -6 -v -nw veth-test -r

Actual results:
there are initscript relics in the output:

grep: /etc/sysconfig/network-scripts/ifcfg-*: No such file or directory
grep: /etc/sysconfig/network-scripts/ifcfg-*: No such file or directory
grep: /etc/sysconfig/network-scripts/ifcfg-*: No such file or directory

Expected results:
no "No such file or directory"

Additional info: