fix(setup-check): change missing daemon from error to info

[oleksandr-nc]

Fixes #727

Changes the setup check severity from "error" to "info" when no default deploy daemon is configured.

AppAPI's deploy daemon is optional functionality - Nextcloud works perfectly fine without it. Showing a red error for unconfigured optional features creates unnecessary alarm for users who don't need ExApps (e.g., single-user instances, systems without Docker).

The message still informs users how to configure a daemon if they want to use External Apps.

[oleksandr-nc]

/backport to stable32

[oleksandr-nc]

/backport to stable31

[backportbot]

The backport to stable31 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable31
git pull origin stable31

# Create the new backport branch
git checkout -b backport/751/stable31

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 622c916a

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/751/stable31

Error: Failed to check for changes with origin/stable31: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.