Please consider adding a point on the command guidelines to test on sovereign clouds

**Related command**

**Is your feature request related to a problem? Please describe.**

Please consider adding a point on the [command guidelines](https://github.com/Azure/azure-cli/blob/dev/doc/command_guidelines.md) to test on sovereign clouds.
There are been multiple instances where commands have been updated to an api version that is not supported on sovereign clouds, for example #23985, #31916, #31943.
#31943 was [identified](https://github.com/Azure/azure-cli/issues/31943#issuecomment-3184306089) as being caused by #31739 which checked all the current checkboxes on the checklist.

**Describe the solution you'd like**

To not keep repeating this issue of hardcoding api versions into az cli commands that are not supported on sovereign clouds.

**Describe alternatives you've considered**

#26397

**Additional context**