[VolumetricRendering] Fix crashes in batch mode

[fredroy]

Those 2 components are purely based on OpenGL (opengl code in update visual and draw().
But unexpectedly, updateVisual() is called, even in batch mode
This PR simply skips the updateVisual() if the Visual params does not handle opengl (which is the case in batch)

Philosophical question: should we really updateVisual if there is no visual ?

sofa/Sofa/framework/Simulation/Core/src/sofa/simulation/Simulation.cpp

Line 274 in 26f65f1

root->execute<VisualUpdateVisitor>(params);

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• it builds with SUCCESS for all platforms on the CI.
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• it does not generate new unit test failures.
• it does not generate new scene test failures.
• it does not break API compatibility.
• it is more than 1 week old (or has fast-merge label).

[fredroy]

[ci-build][with-all-tests]

[fredroy]

[ci-build][with-all-tests][force-full-build]