Fix #12591: Give descriptive error when station construction fails due to wrong layout #12678
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Motivation / Problem
Per #12591, some NewGRF station sets require a specific arrangement of tiles for certain station layouts.
Using drag-and-drop construction, the player can try to build a different tile arrangement, like only one tile for a station layout that requires two tracks. This fails, but only returns a generic error message.
Description
Return a descriptive error message.
Closes #12591.
Limitations
Checklist for review
Some things are not automated, and forgotten often. This list is a reminder for the reviewers.