[dynamo] fix pruning locals with ShapeEnvSource

[isuruf]

Stack from ghstack (oldest at bottom):

• Enable C++ dynamic shape guards by default #140756
• [dynamo] fix selecting shape guards #154772
• [dynamo] add missing algorithm header #154754
• [dynamo] fix debugging code_parts for relational guards #154753
• -> [dynamo] fix pruning locals with ShapeEnvSource #154752

cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @chenyang78 @kadeng @chauhang @amjames

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✅ You can merge normally! (2 Unrelated Failures)

As of commit b794509 with merge base 0f81c7a ():

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

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

• pull / cuda12.8-py3.10-gcc9-sm75 / test (pr_time_benchmarks, 1, 1, linux.g4dn.metal.nvidia.gpu) (gh) (trunk failure)
  MISSING REGRESSION TEST
• trunk / macos-py3-arm64 / test (default, 1, 3, macos-m1-stable) (gh) (trunk failure)
  inductor/test_compile_subprocess.py::CpuTests::test_AllenaiLongformerBase_repro_cpu

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[isuruf]

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[isuruf]

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Merge started

Your change will be merged while ignoring the following 2 checks: pull / cuda12.8-py3.10-gcc9-sm75 / test (pr_time_benchmarks, 1, 1, linux.g4dn.metal.nvidia.gpu), trunk / macos-py3-arm64 / test (default, 1, 3, macos-m1-stable)

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