TSL: Fix tslFn() output type called before build

[sunag]

Description

This fix allows you to use function calls before the build process, allowing you to provide the correct output type from the function. In the example below tangentGeometry is the return of attribute( 'tangent', 'vec4' ) and not a function because this is called at the end of the function, like tslFn( ... )() the function will return ShaderCallNodeInternal , the call is executed only in the building process.

export const tangentGeometry = /*#__PURE__*/ tslFn( ( stack, builder ) => {

	if ( builder.geometry.hasAttribute( 'tangent' ) === false ) {

		builder.geometry.computeTangents();

	}

	return attribute( 'tangent', 'vec4' );

} )();