Structure blocks save sleeping villagers' absolute position

Steps to reproduce:
1. Get a structure block with /give @s structure_block
2. Save a structure containing a bed occupied by a villager, with "Include Entities" on
3. Destroy the existing structure
4. Load the structure at a different position in the world, with "Include Entities" on
The newly placed bed is empty, and a villager appears where the bed was when the structure was saved.

Expected behavior: When loaded, the structure should contain a bed occupied by a villager.

Note: If the original bed was not destroyed in Step 3 and is still occupied by a villager when the structure is loaded, this will cause two villagers to sleep in the same bed.