[stable-33.0] fix(macOS): Always use un-sandboxed path for sync folder location in wizard(s)

[claucambra]

Summary

In some cases (i.e. advanced setup wizard) we do not use the unsandboxed home location (in the old wizard for stable-33)

This fixes that

Checklist

• Sign-off message is added to all commits.
• The commit messages are following The Conventional Commits specification.
• The commit history is clean with no merge commits.
  • How to rebase your commits
  • How to squash commits with rebase
• Uploaded screenshots from before and after for UI changes.
• Test(s) added to branch, with before/after results included in PR description, for performance improvements where applicable.
• Documentation has been updated or is not required.
• Backports requested where applicable (critical bugfixes).
• Labels added where applicable (bug/enhancement).
• Milestone added for target version.

AI (if applicable)

• The content of this PR was partly or fully generated using AI
  • I have read the guidelines for AI-assisted contributions.
  • I have read Nextcloud's AI Contribution Policy.

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)
3 New Code Smells (required ≤ 0)

See analysis details on SonarQube Cloud

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[github-actions]

Artifact containing the AppImage: nextcloud-appimage-pr-10720.zip

Digest: sha256:a3f2e651648ae50a31d6103d152de45c1407e4c49babecd4cae680c31e3aa4c0

To test this change/fix you can download the above artifact file, unzip it, and run it.

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