Add a SamplerLCMUpscale node.

This sampler is an LCM sampler that upscales the latent during sampling.

It can be used to generate at a higher resolution with an LCM model very
quickly.

To try it use it with a basic 5 step LCM workflow with scale_ratio 1.5 or
2.0

nodes.py

@@ -1945,6 +1945,7 @@ def init_custom_nodes():
         "nodes_pag.py",
         "nodes_align_your_steps.py",
         "nodes_attention_multiply.py",
+        "nodes_advanced_samplers.py",
     ]
 
     import_failed = []