Shaders: pragma require for a specific stage may result in one stage compiled with FXC and another stage with DXC

STR:
1. Create a new project using the 3D template.
2. Copy the attached shader to the Assets folder.
3. Add a cube to the scene.
4. Create a new material, assign to the cube.
5. Assign the shader from step 2 to the material.

Expected: cube renders solid white.
Actual: cube doesn't render, error(s) in the console.

Affected versions: 2021.1.0a2+