pci: Enable MSI on GCE arm64 VMs

[wac_gmail.com]

Summary

Add a PCI_QUIRK_ENABLE_MSI_VM quirk for the Google gve(4) device (0x1ae0:0x0042) which is generally exposed at pci0:0:0 on Google Compute Engine (GCE) current generation arm64 instances.

This is specifically required for arm64 VMs where the generic bridge device populated by ACPI is not trusted by the MSI blocklist and needs this quirk, but it is fine for all other GCE VMs as well.

Test Plan

Boot various c4a VMs with this change in place and without hw.pci.honor_msi_blacklist=0 in /boot/loader.conf. Observe proper interrupt assignment, network interrupt handling for gve(4), and non-glacial nvme(4) performance.