[WIP] do not merge, investigation of TSNE on uxl-gpu-xlarge github actions runner

[icfaust]

Description

This is just for testing the runner, the goal is to extract an understanding manifold/tests/test_t_sne.py::test_sparse_precomputed_distance test (will direct copy into a python file), to see what is causing it to run so slow.

Turns out perf, py-spy other profilers which rely on driver/kernel access are not possible due to runner privileges. We just need to know runtimes, because its 100x+ slower hopefully the issue should show itself easily with gprof or equivalent (using google profile tools because of the icpx build).

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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