Is the serial console broken for ARM A1 Flex VMs?
Serial console does not seem to work for ARM A1 Flex VMs, but it does work for AMD VMs.
Cloud Shell does not show any output. Tried it from another host via ssh and same behavior, no output.
All I see is this and then no output or input:
```
Running instance console connection version 1
2021/10/20 19:22:21 Fetching instance info.
2021/10/20 19:22:21 Looking for existing console connections.
2021/10/20 19:22:24 Waiting for Instance Console Connection to complete transition. Current state: CREATING
2021/10/20 19:22:27 Instance Console Connection reached state: ACTIVE
2021/10/20 19:22:27
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IMPORTANT: Use a console connection to troubleshoot a malfunctioning instance. For normal operations, you should connect to the instance using a Secure Shell (SSH) or Remote Desktop connection. For steps, see