[Test] Fix flaky parallel env test

[vmoens]

No description provided.

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/rl/3161

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❌ 6 New Failures, 2 Cancelled Jobs, 13 Pending, 1 Unrelated Failure

As of commit 1f56484 with merge base d58723e ():

NEW FAILURES - The following jobs have failed:

• Build Windows Wheels / pytorch/rl / build-wheel-py3_10-cuda13_0 (gh)
  Process completed with exit code 1.
• Build Windows Wheels / pytorch/rl / upload / upload-wheel-py3_10-cuda13_0 (gh)
  Unable to download artifact(s): Artifact not found for name: pytorch_rl__3.10_cu130_x64
• Continuous Benchmark (PR) / CPU Pytest benchmark (gh)
  Process completed with exit code 2.
• Continuous Benchmark / GPU Pytest benchmark (gh)
  Process completed with exit code 2.
• Habitat Tests on Linux / tests (3.9, 12.8) / linux-job (gh)
  RuntimeError: Command docker exec -t f67b1a94a30126b79dc37bf9fa4d37c76e5a198bdfa3a70ff67cac60f073844f /exec failed with exit code 1
• Lint / c-source / linux-job (gh)
  RuntimeError: Command docker exec -t d2318adefe306bfa5f5a7c080a63cacbc2260284204a7d07d0c1cfa25263dad8 /exec failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Continuous Benchmark (PR) / GPU Pytest benchmark (gh)
• Continuous Benchmark / CPU Pytest benchmark (gh)
  Process completed with exit code 2.

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

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

• Libs Tests on Linux / unittests-gym (3.9, 12.8) / linux-job (gh) (trunk failure)
  AttributeError: module 'torch' has no attribute 'compiler'

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