Mlx delegate part2

[metascroy]

This is MLX delegate part2, which focusses on adding ops.

[pytorch-bot]

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❌ 1 New Failure, 1 Cancelled Job, 2 Pending, 1 Unrelated Failure

As of commit d3807dc with merge base 38c5ca3 ():

NEW FAILURE - The following job has failed:

• Cadence Build & Test / cpu-test / test-ops / test-ops (gh)
  examples/cadence/operators/test_g3_ops.py::ATenOpTestCases::test_g3_neg_out_5

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

• pull / unittest-editable / windows / windows-job (gh)

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

• pull / unittest / macos / macos-job (gh) (detected as infra flaky with no log or failing log classifier)

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[manuelcandales]

stamping, make sure CI is green before landing

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