Arm backend: Add pass to handle int64 placeholders

[YufengShi-dudu]

• Add InsertInt32CastsAfterInt64PlaceholdersPass to insert an int64->int32 cast node after each int64 placeholder.
• Deprecate the use of InsertCastForOpsWithInt64InputPass and in favor of InsertInt32CastsAfterInt64PlaceholdersPass; replace its usage

Change-Id: Ic092f57b56d1bab0e82205e5dd129c49e50862c0

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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

As of commit eeeb6fd with merge base 8973eeb ():

NEW FAILURES - The following jobs have failed:

• pull / unittest / macos / macos-job (gh)
  exir/tests/test_quant_fusion_pass.py::TestQuantFusionPass::test_embedding_torchao
• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

• trunk / test-models-macos-cpu (w2l, xnnpack-quantization-delegation) / macos-job (gh)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-openvino-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[zingo]

MacOs fails are unrelated