[Feature]: Merge modeling files that remove "patches"

[govind-ramnarayan]

🚀 The feature, motivation and pitch

After merging the infrastructure changes, one additional piece of modeling infra that needs to be removed are the "patches" used to patch models beyond their HuggingFace definition to make them AutoDeploy compatible. The new sharding IR relies on custom modeling files, so we want to move entirely to these.

Alternatives

No response

Additional context

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