Fix hybrid fp8 test guard

[negvet]

Description

Please include a brief summary of the changes, relevant motivation and context.

Fixes # (issue)

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Please list the changes introduced in this PR:

• Change A
• Change B

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[negvet]

/te-ci pytorch

[greptile-apps]

Greptile Summary

This PR prevents two hybrid FSDP2 tests from failing on systems without FP8 support by adding matching pytest skip guards.

• Guards the FusedAdam hybrid FP8-current-scaling test.
• Guards the all-Identity test because its enabled Transformer Engine autocast context still requires FP8 availability.

Confidence Score: 5/5

The PR appears safe to merge; both guards align with the runtime requirements of their respective tests.

No actionable defects were identified, and both tests would otherwise reach code paths that reject environments where the shared FP8 availability check fails.

Important Files Changed

Filename	Overview
tests/pytorch/distributed/fsdp2_tests/run_fsdp2_fused_adam.py	Adds an appropriate FP8 availability guard to a hybrid current-scaling test.
tests/pytorch/distributed/fsdp2_tests/run_fsdp2_model.py	Adds an FP8 availability guard matching the unconditional requirement of the test’s enabled autocast context.

_{Reviews (1): Last reviewed commit: "Fix hybrid fp8 test guard" | Re-trigger Greptile}

[vthumbe1503]

LGTM