Code review comment for ~fourdollars/pc-enablement/+git/oem-scripts:master

I don't quite familiar with this piece of code but I think we should gate it by oem-meta-package of autopkgtest because different OEM/LTS have different rule.

I thought
```
oem-meta-packages SKIP exit status 77 and marked as skippable
```

May I know why it be skipped? If we have some test cases from
1. stella-cmit-focal
2. sutton-bachman-focal
3. sutton-newwell-focal
4. sutton-simon-focal
5. somerville-focal

6. stella-jammy
7. sutton-jammy
8. somerville-jammy

Then it will be easy to be reviewed.