[WIP] Devtool end-to-end tests

[HonestDeng]

Devtool end-to-end tests

Add and end-to-end test for devtools.

Fixes #9778

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/9925

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❌ 1 New Failure

As of commit 181c8ab with merge base c9c5481 ():

NEW FAILURE - The following job has failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels

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[github-actions]

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