gh-36678: CI conda: Ignore baseline test failures 
    
<!-- ^^^^^
Please provide a concise, informative and self-explanatory title.
Don't put issue numbers in there, do this in the PR body below.
For example, instead of "Fixes #1234" use "Introduce new method to
calculate 1+1"
-->
<!-- Describe your changes here in detail -->

<!-- Why is this change required? What problem does it solve? -->
This makes the CI conda pass by marking affected files as "known
baseline failures", thus reducing the noise that this workflow makes on
PRs (including
#36666 (comment))

Less intrusive version of #36372.

In addition to the failure marked there, here we collect a number of
more failures observed over the course of a week in
https://github.com/sagemath/sage/actions/workflows/ci-
conda.yml?query=is%3Acompleted

<!-- If this PR resolves an open issue, please link to it here. For
example "Fixes #12345". -->
<!-- If your change requires a documentation PR, please link it
appropriately. -->

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->
<!-- If your change requires a documentation PR, please link it
appropriately -->
<!-- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
<!-- Feel free to remove irrelevant items. -->

- [x] The title is concise, informative, and self-explanatory.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on
- #12345: short description why this is a dependency
- #34567: ...
-->

<!-- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
    
URL: #36678
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Tobias Diez

Author: Release Manager

.github/workflows/ci-conda-known-test-failures.json

@@ -0,0 +1,53 @@
+{
+    "sage_setup.clean": {
+        "failed": true
+    },
+    "sage.combinat.cluster_algebra_quiver.quiver": {
+        "failed": true
+    },
+    "sage.geometry.cone": {
+        "failed": true
+    },
+    "sage.groups.matrix_gps.finitely_generated_gap": {
+        "failed": true
+    },
+    "sage.interfaces.expect": {
+        "failed": true
+    },
+    "sage.libs.gap.element": {
+        "failed": true
+    },
+    "sage.libs.singular.singular": {
+        "failed": true
+    },
+    "sage.matrix.matrix2": {
+        "failed": true
+    },
+    "sage.matrix.matrix_integer_sparse": {
+        "failed": true
+    },
+    "sage.misc.lazy_import": {
+        "failed": true
+    },
+    "sage.misc.weak_dict": {
+        "failed": true
+    },
+    "sage.modular.modform.l_series_gross_zagier": {
+        "failed": true
+    },
+    "sage.rings.function_field.drinfeld_modules.morphism": {
+        "failed": true
+    },
+    "sage.rings.polynomial.multi_polynomial_ideal": {
+        "failed": true
+    },
+    "sage.rings.polynomial.multi_polynomial_libsingular": {
+        "failed": true
+    },
+    "sage.rings.polynomial.skew_polynomial_finite_field": {
+        "failed": true
+    },
+    "sage.tests.gap_packages": {
+        "failed": true
+    }
+}

.github/workflows/ci-conda.yml

@@ -92,7 +92,7 @@ jobs:
       - name: Test
         if: success() || failure()
         shell: bash -l {0}
-        run: ./sage -t --all -p0
+        run: ./sage -t --all --baseline-stats-path=.github/workflows/ci-conda-known-test-failures.json -p0
 
       - name: Print logs
         if: always()