Mark unstable tests in klyachko.py due to #32773

[tornaria]

📚 Description

These two test failures occasionally waste a whole CI run. Here we just flag them as random so it can be quickly merged, while #32773 is resolved. Since the issue is already known and reported, there is no point to keep running these tests.

Note that the issue in question has a needs_review patch but according to the comments it only solves one of the two tests.

📝 Checklist

• I have made sure that the title is self-explanatory and the description concisely explains the PR.
• I have linked an issue or discussion.

[codecov-commenter]

Codecov Report

Base: 88.59% // Head: 88.58% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (2df4448) compared to base (104dde9).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #35058      +/-   ##
===========================================
- Coverage    88.59%   88.58%   -0.01%     
===========================================
  Files         2136     2136              
  Lines       396142   396142              
===========================================
- Hits        350948   350911      -37     
- Misses       45194    45231      +37     

Impacted Files	Coverage Δ
src/sage/schemes/toric/sheaf/klyachko.py	92.43% <ø> (ø)
src/sage/groups/affine_gps/euclidean_group.py	88.88% <0.00%> (-11.12%)	⬇️
src/sage/interfaces/qsieve.py	71.30% <0.00%> (-2.61%)	⬇️
src/sage/groups/affine_gps/affine_group.py	96.62% <0.00%> (-2.25%)	⬇️
src/sage/rings/polynomial/pbori/parallel.py	59.82% <0.00%> (-1.79%)	⬇️
...e/combinat/cluster_algebra_quiver/mutation_type.py	47.50% <0.00%> (-1.55%)	⬇️
src/sage/modular/arithgroup/congroup_gamma0.py	94.41% <0.00%> (-0.56%)	⬇️
src/sage/cpython/_py2_random.py	74.79% <0.00%> (-0.42%)	⬇️
src/sage/graphs/generic_graph.py	89.14% <0.00%> (-0.40%)	⬇️
src/sage/schemes/elliptic_curves/hom_velusqrt.py	94.09% <0.00%> (-0.40%)	⬇️
... and 17 more

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[mkoeppe]

This seems the right thing to do.

[dimpase]

OK, any chance it's getting properly fixed? (the code was written by @vbraun, as git blame says)

[dimpase]

let's merge this - it will improve CI