Add --gce_extra_network_interface_options flag to customize --network-interface when creating GCE VMs

PiperOrigin-RevId: 853736860

Author: p3rf Team

CHANGES.next.md

@@ -636,3 +636,4 @@
 -   Updated the CONTRIBUTING.md guide with steps to minimize merging & review
     friction for new PRs.
 -   Support gs:// URLs in --ycsb_tar_url.
+-   Add `--gce_extra_network_interface_options` flag.

perfkitbenchmarker/providers/gcp/flags.py

@@ -106,6 +106,12 @@
     'subnet, given in CDR notation. Not used unless '
     '--gce_subnet_region is given.',
 )
+GCE_EXTRA_NETWORK_INTERFACE_OPTIONS = flags.DEFINE_list(
+    'gce_extra_network_interface_options',
+    [],
+    'Additional options to pass to --network-interface when creating a VM. '
+    'This flag can be specified multiple times.',
+)
 GCE_AVAILABILITY_DOMAIN_COUNT = flags.DEFINE_integer(
     'gce_availability_domain_count',
     0,

perfkitbenchmarker/providers/gcp/gce_virtual_machine.py

@@ -744,6 +744,7 @@ def _GenerateCreateCommand(self, ssh_keys_path):
               ]
               + gce_nic_queue_count_arg
               + no_address_arg
+              + gcp_flags.GCE_EXTRA_NETWORK_INTERFACE_OPTIONS.value
           ),
       ]