Artifacts are rendered in UITK when using Font Assets and using negative outlines

Steps to reproduce:

1. Create and open a new project
2. Import the "CalibriBold SDF-2.asset" and "CalibriBold.ttf" into the project
3. Create and open a new UXML file in UI Builder
4. Create a Label in the UI Builder's Hierarchy and select it
5. Expand the "Text" foldout in the Inspector
6. Change the Font type to "Font Asset"
7. Assign the imported Font Asset in the Object field
8. Expand the "Text Effects" and type "-1" into the Outline Width field
9. Observe the UI Builder's viewport

Actual results: Artifacts are visible around each letter

Expected results: No artifacts are rendered

Reproducible with versions: 6000.5.2f1, 6000.6.0a1, 6000.6.0b1, 6000.7.0a1

Not reproducible with versions: 6000.0.78f1, 6000.3.19f1, 6000.5.0a7

Tested on (OS): Windows 11 Pro

Notes:

• Text is rendered with artifacts in the Scene view/Game view as well
• Without an outline, the text might not render when the Font Asset is assigned
• A positive outline does not produce the artifacts