kvm-test: add options for server-force-no-gpgpu

Add option to pass "subiquity-server-force-no-gpgpu" on the kernel
command line.

scripts/kvm-test.py

@@ -242,6 +242,10 @@ def load_config(self):
                     help='load predefined memory, disk size and qemu options')
 parser.add_argument('--fake-pci-devices', action='store_true', default=False,
                     help='trick ubuntu-drivers into installing drivers')
+parser.add_argument('--server-force-no-gpgpu', action='store_true', default=False,
+                    help=('Allows for broadcom driver install on Server but only'
+                          ' during online install'),
+                    )
 
 
 cc_group = parser.add_mutually_exclusive_group()
@@ -595,6 +599,9 @@ def install(ctx):
             if ctx.args.fake_pci_devices:
                 appends.append('subiquity-fake-pci-devices')
 
+            if ctx.args.server_force_no_gpgpu:
+                appends.append('subiquity-server-force-no-gpgpu')
+
             if not ctx.args.no_disk:
                 match ctx.args.disk_interface:
                     case 'virtio':