Incorrect values in ReadPixel for some 16bit GraphicsFormat when on Windows

Unity: DirectX12

2023.1.X

2022.2.X

2021.3.X

2022.1.X

2020.3.X

Fixed support for readback formats

On 2020.3 U16 RG and U16 RGBA is not supported for image ReadPixel, so these are not expected to work in 2020.3

To reproduce:
1. Open the user’s project
2. Expand ‘Bug’ GameObject in the Hierarchy
3. Select any ‘Invalid’ GameObject
4. Look at the Inspector

Expected result: Density curve is the same as the Element curve
Actual result: Density curve differs from the Element curve

Reproducible with: 2021.3.9f1, 2022.1.16f1, 2022.2.0b8, 2023.1.0a10
Could not test with: 2020.3.40f1 (Console errors)

Reproduced on: Windows 10
Not reproduced on: macOS Monterey 12.5.1 (Intel)