T5742: Allow defining port-group as a one-line config

[HollyGurza]

Change Summary

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T5742

Related PR(s)

Component(s) name

Proposed changes

How to test

Smoketest result

vyos@vyos:~$ python3 /usr/libexec/vyos/tests/smoke/cli/test_firewall.py 
test_bridge_basic_rules (__main__.TestFirewall.test_bridge_basic_rules) ... ok
test_flow_offload (__main__.TestFirewall.test_flow_offload) ... 
Interface "eth0.10" does not support hardware offload

ok
test_geoip (__main__.TestFirewall.test_geoip) ... Updating GeoIP. Please wait...
Updating GeoIP. Please wait...
ok
test_groups (__main__.TestFirewall.test_groups) ... ok
test_ipv4_advanced (__main__.TestFirewall.test_ipv4_advanced) ... ok
test_ipv4_basic_rules (__main__.TestFirewall.test_ipv4_basic_rules) ... ok
test_ipv4_dynamic_groups (__main__.TestFirewall.test_ipv4_dynamic_groups) ... ok
test_ipv4_global_state (__main__.TestFirewall.test_ipv4_global_state) ... ok
test_ipv4_mask (__main__.TestFirewall.test_ipv4_mask) ... ok
test_ipv4_state_and_status_rules (__main__.TestFirewall.test_ipv4_state_and_status_rules) ... ok
test_ipv4_synproxy (__main__.TestFirewall.test_ipv4_synproxy) ... 
"synproxy" option allowed only for action synproxy

ok
test_ipv6_advanced (__main__.TestFirewall.test_ipv6_advanced) ... ok
test_ipv6_basic_rules (__main__.TestFirewall.test_ipv6_basic_rules) ... ok
test_ipv6_dynamic_groups (__main__.TestFirewall.test_ipv6_dynamic_groups) ... ok
test_ipv6_mask (__main__.TestFirewall.test_ipv6_mask) ... ok
test_nested_groups (__main__.TestFirewall.test_nested_groups) ... 
Group "smoketest_network1" has a circular reference

ok
test_source_validation (__main__.TestFirewall.test_source_validation) ... ok
test_sysfs (__main__.TestFirewall.test_sysfs) ... ok
test_timeout_sysctl (__main__.TestFirewall.test_timeout_sysctl) ... ok
test_zone_basic (__main__.TestFirewall.test_zone_basic) ... ok
test_zone_flow_offload (__main__.TestFirewall.test_zone_flow_offload) ... 
Interface "eth0" does not support hardware offload

ok

----------------------------------------------------------------------
Ran 21 tests in 77.350s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[c-po]

IMHO it would rather make more sense to have port be a multi node. It was a pain in the past to migrate such nodes from comma or whitespace separated strings to multi nodes.

[github-actions]

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