Flipped Tiles with normal maps are inverted with TilemapRenderer with Chunk Mode

From https://discussions.unity.com/t/inverted-normal-map-for-flipped-tile-in-chunk-tilemap/1717641

Steps to reproduce:

1. Follow user's reproduction steps from discussions thread

Actual results: 

Normals are inverted for flipped Tiles

Expected results: 

Normals are not inverted for flipped Tiles

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

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