[PyTorch] Enable quantized activation backward kernels in operation-based API tests

[timmoon10]

Description

#1462 and #1460 are attempting to fix a correctness bug in the FP8 and MXFP8 backward activation kernels. This PR modifies the operation-based API tests (test_fusible_ops.py) so that they includes these kernels. These tests have tighter tolerances than the module tests (e.g. test_numerics.py), so they would have caught this bug.

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
• Testing

Changes

• Enable quantized activation backward kernels in operation-based API tests

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

[timmoon10]

/te-ci pytorch