[BUG] "skip_config" attribute does not work for devices configured with scripts

[ipspace]

Results of platform/config/05-skip-config:

[CONFIG]  eos_f: normalize,initial,ospf,bgp,bgp.session
[CONFIG]  eos_nb: normalize,initial,ospf
[CONFIG]  eos_nd: normalize,initial,ospf,bgp
[CONFIG]  frr_f: initial,ospf,bgp,bgp.session,daemons,hosts
[CONFIG]  frr_nb: initial,ospf,daemons,hosts (shared)
[CONFIG]  frr_nd: initial,ospf,bgp,daemons,hosts (shared)
[CONFIG]  bird_f: initial,routing,bird,bgp,ospf,hosts (shared)
[CONFIG]  bird_nb: initial,routing,bird,ospf,hosts (shared)
[CONFIG]  probe: initial,ospf,bgp,daemons,hosts (shared)
Created provider configuration file: clab.yml
Errors encountered while processing 05-skip-config.yml
IncorrectValue in clab: File node_files/eos_nd/bgp.session mapped to /mnt/flash/05-bgp@session.sh on node eos_nd does not exist
IncorrectValue in clab: File node_files/frr_nd/bgp.session mapped to /etc/config/04-bgp@session.sh on node frr_nd does not exist
Fatal error in netlab: Cannot proceed beyond this point due to errors, exiting

We have to consider "skip_config" when creating clab mappings.