[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 collective-stream capability detection by requiring both the minimum JAX version and a successful compute_on import, while suppressing a false-positive pylint diagnostic.

• Caches the collective-stream support probe and safely disables the annotation when the optional JAX API cannot be imported.
• Documents the intentional callable use of compute_on for pylint.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
transformer_engine/jax/version_utils.py	Adds a cached import-level capability check so unsupported JAX installations return false instead of failing when collective-stream support is selected.
transformer_engine/jax/cpp_extensions/ep.py	Suppresses the false-positive not-callable warning without changing collective-stream runtime behavior.

_{Reviews (2): Last reviewed commit: "Merge branch 'main' into jax_compute_on_..." | Re-trigger Greptile}