[stable25] fix(integrity): expect pkg mgmt files

[blizzz]

Based on backport/495/stable25

backport of #494

[blizzz]

/backport to stable24

[backportbot-nextcloud[bot]]

The backport to stable24 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable24
git pull origin stable24

# Create the new backport branch
git checkout -b fix/foo-stable24

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable24

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport