VM start waits for integrity extension even without extension support

### Describe the bug

Trusted VM are instructed to install the integrity extension by default. However nowhere does it check before if the image provides extension support, which was disabled in Debian in response to #26803. So it will wait for a long time, hours or so.

### Related command

`az vm create --debug -n test -g group --image debian:debian-sid-daily:sid-gen2:latest --security-type TrustedLaunch --enable-secure-boot`

### Errors

It will wait for extensions.

### Issue script & Debug output

Unrelated

### Expected behavior

Check the extensions flag or at least not block on the operation.

### Environment Summary

```
azure-cli 2.51.0

core 2.51.0
telemetry 1.1.0

Extensions:
ai-examples 0.2.5
ml 2.19.1
ssh 2.0.1

Dependencies:
msal 1.24.0b1
azure-mgmt-resource 23.1.0b2

Python location '/usr/bin/python3.9'
Extensions directory '/home/test/.azure/cliextensions'
Extensions system directory '/usr/lib/python3.9/site-packages/azure-cli-extensions'

Python (Linux) 3.9.14 (main, Feb 8 2023, 03:39:52)
[GCC 11.2.0]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.
```

### Additional context

Workaround for Debian is to disable the trusted launch flag in the images, then the client gives a somewhat useful error message.

```
"Use of TrustedLaunch setting is not supported for the provided image."
```