CUDA backend: fix targets file for passes

[digantdesai]

Summary: as title

Reviewed By: Gasoonjia

Differential Revision: D89825579

[pytorch-bot]

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❌ 1 New Failure, 1 Unrelated Failure

As of commit bc39c1c with merge base f3c92ae ():

NEW FAILURE - The following job has failed:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t 57e753f34de93d847c035af62d66ee34184506d87ffaebdd5bd94621bcf98e2b /exec failed with exit code 1

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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[Copilot]

Pull request overview

This PR adds a proper build target for the CUDA backend passes module that was previously missing from the TARGETS file.

• Adds a new cuda_passes python_library target that includes the passes source files
• Updates the cuda_backend target to explicitly depend on cuda_passes

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