[stable27] Move deprecation warnings to debug

[szaimen]

Manual backport of #38852 to stable27

[szaimen]

/compile amend /

[szaimen]

@skjnldsv looks like the compile command fails?
https://github.com/nextcloud/server/actions/runs/5365075296/jobs/9733658146

[skjnldsv]

skjnldsv looks like the compile command fails? nextcloud/server/actions/runs/5365075296/jobs/9733658146

Looks like the path is different, I think we need to fix the workflow
https://github.com/nextcloud/.github/blob/4eca92e0661636a7815ad98e4c38c2408f71bef2/workflow-templates/command-compile.yml#L37-L45
EDIT: wrong reference, this is not where the path comes from

[szaimen]

Why does it work now?

[skjnldsv]

[szaimen]

/backport to stable26

[backportbot-nextcloud]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26

# Create the new backport branch
git checkout -b fix/foo-stable26

# 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-stable26

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