Simplify binding descriptor sets.

[crud89]

Describe the pull request

This PR simplifies binding descriptor sets. Previously the pipeline that consumes the descriptor sets had to be explicitly provided every time a descriptor set was bound. With the new overload to ICommandBuffer::bind, the pipeline that has been passed to the last call to ICommandBuffer::use will be stored and used for binding. If no pipeline has been used before calling this overload, an error is raised. Those changes make it easier decouple resource binding from pipeline management and keeps the interface more in line with the other bind overloads that handle index and vertex buffers:

commandBuffer->use(geometryPipeline);
commandBuffer->bind(cameraBindings); // Equivalent to calling commandBuffer->bind(cameraBindings, geometryPipeline) in this case.

// Binding index and vertex buffers for comparison:
commandBuffer->bind(vertexBuffer);
commandBuffer->bind(indexBuffer);