Add MediaTek backend CI

[neuropilot-captain]

• Adding CI for MediaTek backend
• Add test to workflow

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/7120

• 📄 Preview Python docs built from this PR

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❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• ROCM Infra failures during checkout of PyTorch

❌ 7 New Failures, 2 Unrelated Failures

As of commit 6375007 with merge base f370e78 ():

NEW FAILURES - The following jobs have failed:

• pull / test-llava-runner-linux / linux-job (gh)
  test_generated_output
• pull / test-mediatek-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 99963176e576ddc0551b6a35d550805e728e47736ed1e58fc3bdc64f857bd406 /exec failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 339bdf6049cb93126dfbc2797d19063606fc9a3871880cb05ea7dd633a98ff12 /exec failed with exit code 1
• pull / unittest / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-arm / linux-job (gh)
  RuntimeError: Command docker exec -t 2e4024785c1883af8005380c1abfedec48186137310686c881efeb88e9b7e2a3 /exec failed with exit code 127
• trunk / test-arm-backend-delegation / linux-job (gh)
  RuntimeError: Command docker exec -t 8418cf544b7e7af05a3812ea0f7e8ba6489fe4c962b9ec2b8dab1c191255b6d2 /exec failed with exit code 127
• trunk / test-arm-reference-delegation / linux-job (gh)
  RuntimeError: Command docker exec -t 3785fe7fba34c2d0f7c70f4a987cd3ba65f5b409608096f1ace8626977450df6 /exec failed with exit code 127

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

• trunk / test-models-macos (cmake, mv3, portable, macos-m1-stable, 90) / macos-job (gh) (matched macos rule in flaky-rules.json)
  File doesn't exist
• trunk / test-pybind-build-macos (cmake) / macos-job (gh) (matched macos rule in flaky-rules.json)
  File doesn't exist

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[cccclai]

Hmm, looks like we don't see the new CI job...

[cccclai]

The Ci job shows up now, however it's failing...https://github.com/pytorch/executorch/actions/runs/12493398331/job/34923145038?pr=7120