testing: Enable btrfs-subvol testcase on ubuntu

Signed-off-by: Alexey Gladkov <[email protected]>

Author: legionus

.github/workflows/ci.yml

@@ -75,8 +75,6 @@ jobs:
     strategy:
       matrix:
         name: [
-          "altlinux",
-          "fedora",
           "ubuntu",
         ]
         test: [
@@ -119,8 +117,6 @@ jobs:
             testcase: efi-partition
           - name: ubuntu
             testcase: efi-reqpartition
-          - name: ubuntu
-            testcase: btrfs-subvol
 
           - name: altlinux
             testcase: zfs-partition