Improve GCE detection by checking Google hardware

[TimurSadykov]

Current detection has elevated false-negative rate in certain environments and cause unrecoverable errors. To improve that we add a static detection of Google hardware.

Implement the stage 1 proposal per go/auth-library-noping

[codyoss]

It seems like this got dropped. For many years Go has had the SMIBIOS check for linux, but we still need the check for Windows. We will get this scheduled soon.