fix(QueryBuilder): Account for aliases in output columns

[provokateurin]

• Resolves: QueryBuilder output columns incorrect #48521

Summary

#48361 added error logs when the output column is too long. #48521 shows the output columns weren't extracted correctly as it contained display_mode as display_mode_default which is actually fine because display_mode_default is only 20 chars.

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)

[provokateurin]

/backport to stable30

[come-nc]

Looks sane, did not test.

[icewind1991]

Ideally we should discourage apps from doing aliases like this instead of using selectAlias