Clean cache between Apple builds

[jathu]

Summary

In this diff, we clear the CMakeCache.txt between builds since we reuse the same build output for all the builds. Keeping the cache means that configuration between each build won't be reflected (i.e. #12469).

Test plan

CI

I also tested to ensure that EXECUTORCH_ENABLE_LOGGING is being properly set based on the build mode.

-- PLATFORM: OS64
-- CMAKE_BUILD_TYPE: Release
-- EXECUTORCH_ENABLE_LOGGING: OFF
-- ----------------------------------------------------
-- PLATFORM: OS64
-- CMAKE_BUILD_TYPE: Debug
-- EXECUTORCH_ENABLE_LOGGING: ON
-- ----------------------------------------------------
-- PLATFORM: SIMULATORARM64
-- CMAKE_BUILD_TYPE: Release
-- EXECUTORCH_ENABLE_LOGGING: OFF
-- ----------------------------------------------------
-- PLATFORM: SIMULATORARM64
-- CMAKE_BUILD_TYPE: Debug
-- EXECUTORCH_ENABLE_LOGGING: ON
-- ----------------------------------------------------
-- PLATFORM: MAC_ARM64
-- CMAKE_BUILD_TYPE: Release
-- EXECUTORCH_ENABLE_LOGGING: OFF
-- ----------------------------------------------------
-- PLATFORM: MAC_ARM64
-- CMAKE_BUILD_TYPE: Debug
-- EXECUTORCH_ENABLE_LOGGING: ON
-- ----------------------------------------------------

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12563

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❌ 3 New Failures, 13 Pending, 1 Unrelated Failure

As of commit 55a1658 with merge base 988435d ():

NEW FAILURES - The following jobs have failed:

• pull / android / run-emulator (gh)
  The process '/usr/bin/sh' failed with exit code 255
• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  RuntimeError: Command docker exec -t eecabc0667ccb52e632a64495aab09893aeeb9ae6c4173fe8a47efbe5d981bd7 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t 501e35e092cb17194d9368679fba782a0d6f4a1fecc0e29f9e53cd2055ec9c37 /exec failed with exit code 1

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Apple / build-benchmark-app / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 65

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