Introduce sym_max and sym_min ops to executorch

[kimishpatel]

Added corresponding tests as well

Fixes #11988

Test plan

test added

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12037

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 4 Unrelated Failures

As of commit f167a3a with merge base 478032a ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for exir/emit/test/test_emit.py:

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

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

• pull / unittest / linux / linux-job (gh) (trunk failure)
  extension/llm/export/test/test_export_llm.py::TestExportLlm::test_with_config
• pull / unittest / macos / macos-job (gh) (trunk failure)
  extension/llm/export/test/test_export_llm.py::TestExportLlm::test_with_config
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  extension/llm/export/test/test_export_llm.py::TestExportLlm::test_with_config
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  extension/llm/export/test/test_export_llm.py::TestExportLlm::test_with_config

This comment was automatically generated by Dr. CI and updates every 15 minutes.