[aoti] Remove need for -l in cmake call

[angelayi]

Removes the need for the -l in the cmake call by storing the tokenizer type during export time in the PT2.
Stacked on top of #896

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchchat/1159

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❌ 4 New Failures, 3 Cancelled Jobs, 2 Unrelated Failures

As of commit 23f96d4 with merge base f730056 ():

NEW FAILURES - The following jobs have failed:

• pull / test-gpu-aoti-bfloat16 (cuda, stories15M) / linux-job (gh)
  RuntimeError: aot_export is not currently supported with traceable tensor subclass.
• pull / test-gpu-eval-sanity-check (cuda, stories15M) / linux-job (gh)
  RuntimeError: aot_export is not currently supported with traceable tensor subclass.
• pull / test-tinystories-executorch (macos-14-xlarge) (gh)
  RuntimeError: Failed to load ET compiled /Users/runner/work/torchchat/torchchat/stories15M.pte
• Run the aoti runner with CUDA using stories / test-runner-aot-cuda / linux-job (gh)
  RuntimeError: Command docker exec -t 4af5ebc2814f84a144dcda629a5b0c600d2dbe457bc3bb529088a1fd312f2ace /exec failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• pull / runner-aoti (16-core-ubuntu) (gh)
  ##[error]The operation was canceled.
• pull / runner-et (16-core-ubuntu) (gh)
  ##[error]The operation was canceled.
• pull / test-tinystories-executorch (16-core-ubuntu) (gh)
  ##[error]The operation was canceled.

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / runner-aoti (macos-14-xlarge) (gh) (detected as infra flaky with no log or failing log classifier)
• pull / runner-et (macos-14-xlarge) (gh) (detected as infra flaky with no log or failing log classifier)

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