Add CMake preset for LLM

[pytorchbot]

This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #11052 by @larryliu0820
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/larryliu0820/64/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/larryliu0820/64/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/main
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/larryliu0820/64/orig
@diff-train-skip-merge

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/11066

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❌ 2 New Failures, 1 Cancelled Job

As of commit 64a79ee with merge base d892b66 ():

NEW FAILURES - The following jobs have failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels
• trunk / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t 01519ea05c32d796b1c6e25b70d0319476a8507a95415aa16be8ecc218736387 /exec failed with exit code 1

CANCELLED JOB - The following job was cancelled. Please retry:

• Build Presets / apple (llm) / build (gh)

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