add diff rules for stablehlo.triangular_solve

[mofeing]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.47%. Comparing base (9b51369) to head (328230e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2436   +/-   ##
=======================================
  Coverage   25.47%   25.47%           
=======================================
  Files         220      220           
  Lines       44600    44600           
=======================================
  Hits        11364    11364           
  Misses      33236    33236           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[mofeing]

UPDATE: the diff rules require an update. they are wrong depending on the combination of lower, leftSide, unitDiagonal and transpose_a.

But openxla/stablehlo#2943 should help definitely to test all combinations correctly.