[sa-faizal]

TensileLite pytest jobs can fail during startup when an imported extension loads ASan too late. Preload the discovered runtime when starting the pytest child, preserving existing preloads, sanitizer settings, and the parent environment.

Reuse the existing environment-prepend test to check preload order and parent-environment preservation; no test methods are added. This PR is stacked on #8721 and contains only the pytest follow-up. Retarget to main after that dependency lands.

Validation:

• All 45 existing pytest-runner tests passed on Linux and Windows. Formatting and diff checks passed. Current Linux/Windows unit CI passed.
• On MI325 (gfx942), the current runner with matching host-ASan artifacts collected and passed 25/25 existing timing tests. This validates host-side startup and timing assertions, not GPU kernel execution.
• The 25 assertions pass, but teardown exits 1 with 679,993 bytes in 587 allocations reported by LeakSanitizer. Controlled Python 3.12.3 baselines reproduce leaks from importing pytest alone (69,553 bytes) and NumPy alone (941,456 bytes). The same 25 tests without shared conftest/plugin loading retain only the pytest baseline. These dependency shutdown failures remain unresolved; no sanitizer suppression was added. rocm-libraries #13055 addresses the separate isolated rocisa import leak.

ISSUE ID : #8735

AI-assisted change.

Fixes #8735

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[dileepr1]

The changes look good to avoid startup ASan issues.
@sa-faizal Would you have the link to a test run with this change?

[geomin12]

going to let Dileep review this one

[sa-faizal]

Thanks @geomin12 @dileepr1 here is the run https://github.com/ROCm/TheRock/actions/runs/37393421993

[sa-faizal]

Pytest started, passed hundreds of tests, and reached 68%. That supports the startup fix working in this run. Full suite failed due to timeout. Increased to an hour and rerun - https://github.com/ROCm/TheRock/actions/runs/37402666539

[dileepr1]

Thanks for the link.
The startup fix holds though the test is red.
Looks good to me.