3 /x: Add cache-based model loading path to ETCoreMLModelManager

[metascroy]

Summary:
This is diff 3/9 to implement the new caching system for CoreML, following the design doc here: fbcode/executorch/backends/apple/coreml/docs/new_cache_design.md

[ gdoc version: https://docs.google.com/document/d/1aKwTNj-L3-sAyBetL92RwJdSsSwA4KhvAQ3FO1zbguE/edit?tab=t.0#heading=h.3ecu6rvzx1z3 ]

The design doc contains detailed plans for each diff in the stack, see https://fburl.com/gdoc/actp9mcs for what this diff does.

Reviewed By: digantdesai

Differential Revision: D93044161

[pytorch-bot]

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❌ 2 New Failures, 1 Cancelled Job, 5 Pending, 3 Unrelated Failures

As of commit fec36c5 with merge base 3d2c853 ():

NEW FAILURES - The following jobs have failed:

• trunk / test-arm-backend-ethos-u (test_pytest_ops_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t 2b3aa41d130f84bf0f936b75907765a90e87ee2d54d3e641c72a77b7f4864376 /exec failed with exit code 1
• trunk / unittest-release / linux / linux-job (gh)
  [ FAILED ] KernelTempMemoryAllocatorIntegrationTest.UsingTempMemoryAllocator

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / test-lora-multimethod-linux / linux-job (gh)

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

• pull / unittest / macos / macos-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-arm-backend-with-no-deps (test_pytest_models_tosa) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.
• pull / unittest-editable / macos / macos-job (gh) (detected as infra flaky with no log or failing log classifier)

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[meta-codesync]

@metascroy has exported this pull request. If you are a Meta employee, you can view the originating Diff in D93044161.

[digantdesai]

Review automatically exported from Phabricator review in Meta.

[github-actions]

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[cymbalrush]

thank you!