Feat/ci on slab2

[andrei-stoian-zama]

• Moves the CI to Slab
• fixes the flaky retry skips coverage check result
• removes check links in the weekly
• improves check links to add 5 retries per link
• adds ARM Mac tests - fixes cpu count bug when n-cpus<4
• fixes Intel Mac CI warnings (ignore)

Probably breaks the Release CI, to be fixed later

Closes https://github.com/zama-ai/concrete-ml-internal/issues/4709
Closes https://github.com/zama-ai/concrete-ml-internal/issues/4679
Closes https://github.com/zama-ai/concrete-ml-internal/issues/4428
Closes https://github.com/zama-ai/concrete-ml-internal/issues/4010
Closes https://github.com/zama-ai/concrete-ml-internal/issues/3931
Closes https://github.com/zama-ai/concrete-ml-internal/issues/3498

[kcelia]

thanks

[github-actions]

⚠️ Known flaky tests have been rerun ⚠️

One or several tests initially failed but were identified as known flaky. tests. Therefore, they have been rerun and passed. See below for more details.

Failed tests details

Known flaky tests that initially failed:

• tests/torch/test_compile_torch.py::test_compile_torch_or_onnx_networks[compile-is_onnx-FHE_simulation-BranchingGemmModule-5-relu]

[github-actions]

Coverage passed ✅

Coverage details

---------- coverage: platform linux, python 3.8.18-final-0 -----------
Name    Stmts   Miss  Cover   Missing
-------------------------------------
TOTAL    8545      0   100%

63 files skipped due to complete coverage.

[andrei-stoian-zama]

@jfrery, @kcelia , I got the CI time down by reducing the grid sizes in the comparisons notebooks (only when running in the CI).

The run is here: https://github.com/zama-ai/concrete-ml/actions/runs/13346895240 there was a flaky not-marked at flaky failure but other than that everything went fine. Please review