fix(files_sharing): Disable autocomplete for share label and password

[susnux]

• Resolves: [Bug]: Autofill “Share label” and “Set password” fields when editing a shared link #44451

Summary

Prevent browsers - as good as possible - from filling in user credentials as share label and password.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

/backport to stable29

[susnux]

/backport to stable28

[susnux]

/compile

[github-actions]

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