[RELEASE-ONLY CHANGES] Make dequantize op schemas in ExecuTorch 0.2 compatible with PyTorch 2.3

[manuelcandales]

Reverts the schemas of dequantize ops, so that they are compatible in ExecuTorch release 0.2 with PyTorch release 2.3 The changes reverted are the ones introduced in https://github.com/pytorch/executorch/pull/2308 and https://github.com/pytorch/executorch/pull/2364, which will continue to be present in the main branch, but will be excluded from release 0.2

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/2862

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:x: 1 New Failure

As of commit 0abc93773d0903be01bae2f8b02fe22450c0ebcd with merge base d3326a2073dee7baf78044fb3afd0772edbc616a ():

NEW FAILURE - The following job has failed:

• pull / test-models-linux (cmake, llava_encoder, portable, linux.4xlarge, 90) / linux-job (gh) RuntimeError: Command docker exec -t f586977c7c14e51537c0a8eaab28df9dade62af3e032b5e3657e7603441c9c97 /exec failed with exit code 1

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[dbort]

This PR seems to have picked up a release-cut commit, pulling in some yaml changes. @manuelcandales please rebase your dequantize-schema-compatibility branch on top of the latest release/0.2 branch and re-push.