Add support for LCM main models (#5152)

## What type of PR is this? (check all applicable)

- [ ] Refactor
- [X] Feature
- [ ] Bug Fix
- [ ] Optimization
- [ ] Documentation Update
- [ ] Community Node Submission


## Have you discussed this change with the InvokeAI team?
- [ ] Yes
- [X] No, because: Small obvious fix

      
## Have you updated all relevant documentation?
- [X] Yes
- [ ] No


## Description

This one-line patch adds support for LCM models such as
`SimianLuo/LCM_Dreamshaper_v7`


## Related Tickets & Documents

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- Closes #4951 

## QA Instructions, Screenshots, Recordings

Try installing `SimianLuo/LCM_Dreamshaper_v7` and using with CFG 2.5 and
the LCM scheduler.

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Please provide steps on how to test changes, any hardware or 
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## Added/updated tests?

- [ ] Yes
- [X] Not needed

invokeai/backend/model_management/model_probe.py

@@ -53,6 +53,7 @@ class ModelProbe(object):
         "StableDiffusionXLPipeline": ModelType.Main,
         "StableDiffusionXLImg2ImgPipeline": ModelType.Main,
         "StableDiffusionXLInpaintPipeline": ModelType.Main,
+        "LatentConsistencyModelPipeline": ModelType.Main,
         "AutoencoderKL": ModelType.Vae,
         "AutoencoderTiny": ModelType.Vae,
         "ControlNetModel": ModelType.ControlNet,