Fix a potential memory leak in translucency sorting

Backport of 1caa783 to /dev.

src/main/java/net/caffeinemc/mods/sodium/client/render/chunk/compile/tasks/ChunkBuilderMeshingTask.java

@@ -164,6 +164,7 @@ public ChunkBuildOutput execute(ChunkBuildContext buildContext, CancellationToke
 
         // cancellation opportunity right before translucent sorting
         if (cancellationToken.isCancelled()) {
+            meshes.forEach((pass, mesh) -> mesh.getVertexData().free());
             return null;
         }