This requires disabling libvirt_vm_trust_guest_rx_filters, which when
enabled triggers the following errors when booting baremetal instances
with Tenks on Libvirt 9 (and most likely since 8.9.0):

    Cannot set interface flags on 'macvtap1': Value too large for defined data type

This is apparently triggered by a Libvirt commit refreshing rx-filters
more often [1].

As explained in I71a2051d8acd63379bd70bc1287a059d4a7f6387, this setting
was added to allow traffic destined for other MAC addresses to reach VMs
when using a macvtap interface.

This will prevent multicast from working, but we don't need it for
baremetal tests in CI.

This setting will be enabled again once the issue is resolved in either
Libvirt or Tenks.

This reverts commit 21c68bbf.

Also increase timeout of upgrade jobs which is too short now due to the
added delay added by bare metal testing.

[1] https://gitlab.com/libvirt/libvirt/-/commit/060d4c83ef436cf56abfad51a4d64c39448e199d

Change-Id: I2cfd2667abb1ae8988b7a7fd9761b75c20a0eaa4