[Build] Set correct flatcc path for Windows

[python3kgae]

The binary directory for Windows will have build type like Debug/Release at the end.

For #4661

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/4993

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure

As of commit eec7e96 with merge base 959bb1b ():

NEW FAILURE - The following job has failed:

• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t bf8a2811004ad7f89abb37f480e5bb29bb6bc951399db6ab878f27cab6210095 /exec failed with exit code 132

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

[shoumikhin]

@tarun292, @kirklandsign, @Gasoonjia can you take a look please?

[SS-JIA]

The changes here are covered by #8970 already. I think we can close this PR.