Add suspend/resume to execute

[JakeStevens]

Summary:
Neutron driver provides suspend/resume functions.

This PR adds them to the backend, as close to execute call as possible, gated behind an ifdef so implementations can opt-in.

Differential Revision: D112413599

[pytorch-bot]

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 7f4d949 with merge base e51f1a9 ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / test-qnn-testsuite-linux / test-backend-linux (qnn, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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[meta-codesync]

@JakeStevens has exported this pull request. If you are a Meta employee, you can view the originating Diff in D112413599.

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