Ruined portals can generate replacing End portal frames

The bug:

Ruined portal can break end portal frames. This makes such a portal unusable in survival.

Steps to repro:

1. make a new world with this seed: 1177773159804370

2. Run command: /tp 824.99 28.00 1369.00

Observed Result:

Looking around in the stronghold portal room, one end portal frame block has been replaced by the overhanging netherrack of the ruined portal.

Expected Result:

End portal frames must not be replaced by any blocks from structures.

This can easily be fixed by a new block tag: #minecraft:structures_cannot_replace