++ slice jobs allow failure

ci/publish-slice.py

@@ -47,6 +47,7 @@ def child_pipeline(contours: list[str], release: str, commit: str) -> str:
             "stage": "slices",
             "image": JOB_IMAGE,
             "tags": ["build"],
+            "allow_failure": True,
             "variables": {"GIT_DEPTH": "1"},
             "script": [
                 "printf '%s' \"$SLICES_PUSHER_KEY\" | base64 -d > /tmp/slices-key.json",

ci/tests/test_build_slice.py

@@ -88,5 +88,6 @@ def test_child_pipeline_has_one_job_per_contour():
     doc = yaml.safe_load(ps.child_pipeline(["stand", "vad"], "3.9.68", "abcdef1234"))
     jobs = {k: v for k, v in doc.items() if k != "stages"}
     assert sorted(jobs) == ["slice stand", "slice vad"]
+    assert all(j["allow_failure"] for j in jobs.values())
     assert "--contour vad --release 3.9.68 --commit abcdef1234" in jobs["slice vad"]["script"][1]
     assert all(ord(ch) < 128 for ch in ps.child_pipeline(["stand"], "1.0.0", "a" * 40))