Revert "testing: Temporarily turned off testing on ubuntu due to kernel dependency breakage"

This reverts commit 9fcdfd5.

Author: legionus

.github/workflows/ci.yml

@@ -77,6 +77,7 @@ jobs:
         name: [
           "altlinux",
           "fedora",
+          "ubuntu",
         ]
         test: [
           "local",