Scipy 1.9.1

[h-vetinari]

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[conda-forge-linter]

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[h-vetinari]

@tylerjereddy @rgommers
One new failure on linux (does not seem to happen on osx or windows):

=========================== short test summary info ============================
FAILED linalg/tests/test_solvers.py::test_solve_discrete_are - AssertionError: 
= 1 failed, 49466 passed, 2839 skipped, 253 xfailed, 9 xpassed, 236 warnings in 780.89s (0:13:00) =

which looks like a tolerance violation:

E   AssertionError: 
E   Arrays are not almost equal to 5 decimals
E   
E   Mismatched elements: 1 / 9 (11.1%)
E   Max absolute difference: 1.78702176e-05
E   Max relative difference: inf
E    x: array([[ 1.78702e-05,  1.10194e-05, -2.05636e-06],
E          [ 1.10194e-05,  6.89924e-06, -1.35228e-06],
E          [-2.05636e-06, -1.35601e-06,  2.92435e-07]])
E    y: array([[0., 0., 0.],
E          [0., 0., 0.],
E          [0., 0., 0.]])

The respective machines have:

Supported SIMD extensions in this NumPy install:
    baseline = SSE,SSE2,SSE3
    found = SSSE3,SSE41,POPCNT,SSE42,AVX,F16C,FMA3,AVX2,AVX512F,AVX512CD,AVX512_SKX
    not found = AVX512_KNL,AVX512_KNM,AVX512_CLX,AVX512_CNL,AVX512_ICL

as well as

Supported SIMD extensions in this NumPy install:
    baseline = SSE,SSE2,SSE3
    found = SSSE3,SSE41,POPCNT,SSE42,AVX,F16C,FMA3,AVX2
    not found = AVX512F,AVX512CD,AVX512_KNL,AVX512_KNM,AVX512_SKX,AVX512_CLX,AVX512_CNL,AVX512_ICL

For the latter there's an additional failure:

________________________ test_failure_to_run_iterations ________________________
[gw1] linux -- Python 3.9.13 $PREFIX/bin/python
[...]/site-packages/scipy/sparse/linalg/_eigen/lobpcg/tests/test_lobpcg.py:267: in test_failure_to_run_iterations
    eigenvalues, _ = lobpcg(A, Q, maxiter=20)
E   Failed: DID NOT WARN. No warnings of type (<class 'UserWarning'>,) were emitted. The list of emitted warnings is: [].

[rgommers]

That is likely because of a different BLAS/LAPACK version which we don't test with on the main repo. They seem fairly harmless. Maybe add a test bump for the first issue that we can upstream? And for the second one, maybe open an issue?