Nodes: consume labels() when used, to prevent duplicate uniform names. (#26822)

Co-authored-by: aardgoose <[email protected]>

examples/jsm/nodes/core/UniformNode.js

@@ -39,6 +39,8 @@ class UniformNode extends InputNode {
 		const nodeUniform = builder.getUniformFromNode( sharedNode, sharedNodeType, builder.shaderStage, builder.context.label );
 		const propertyName = builder.getPropertyName( nodeUniform );
 
+		if ( builder.context.label !== undefined ) delete builder.context.label;
+
 		return builder.format( propertyName, type, output );
 
 	}