[JAX][Fix] Gate collective-stream compute_on on import and silence pylint

[phu0ngng]

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

[phu0ngng]

/te-ci L1 JAX

[greptile-apps]

Greptile Summary

The PR strengthens the JAX collective-stream feature gate by checking that jax.experimental.compute_on.compute_on can actually be imported and caching the result. It also suppresses a known false-positive pylint warning at the call site.

• Require both the minimum JAX version and availability of the optional compute_on API.
• Disable the not-callable pylint warning for the imported decorator factory.

Confidence Score: 5/5

The PR appears safe to merge, with no actionable runtime, compatibility, or security defects identified.

The feature gate now verifies the same import used by the collective-stream wrapper, while the other change affects linting only.

Important Files Changed

Filename	Overview
transformer_engine/jax/version_utils.py	Adds a cached importability check to prevent collective-stream support from being enabled when the required experimental JAX API is absent.
transformer_engine/jax/cpp_extensions/ep.py	Adds a narrowly scoped pylint suppression without changing runtime behavior.

_{Reviews (1): Last reviewed commit: "[JAX] Gate collective-stream compute_on ..." | Re-trigger Greptile}