ci/package_checks: Add exception for EULA as a package license

**Summary**

Add an exception for `EULA`, as that is used by the following packages:

```
hsa-amd-aqlprofile
intel-microcode
nvidia-470-glx-driver
nvidia-beta-driver
nvidia-developer-driver
nvidia-glx-driver
opencv
```

This is not a valid SPDX license identifier, but there is no valid alternative.

Resolves #2423

common/CI/package_checks.py

@@ -540,7 +540,7 @@ class SPDXLicense(PullRequestCheck):
     _exceptions_url = 'https://raw.githubusercontent.com/spdx/license-list-data/main/json/exceptions.json'
     _licenses: Optional[List[str]] = None
     _exceptions: Optional[List[str]] = None
-    _extra_licenses = ['Distributable', 'Public-Domain']
+    _extra_licenses = ['Distributable', 'EULA', 'Public-Domain']
     _error = 'Invalid license identifier: '
     _level = Level.WARNING