symeig -> eigvalsh

[alvinzz]

avoids

sparsecoding/inference.py:441: UserWarning: torch.symeig is deprecated in favor of torch.linalg.eigh and will be removed in a future PyTorch release.
The default behavior has changed from using the upper triangular portion of the matrix by default to using the lower triangular portion.
L, _ = torch.symeig(A, upper=upper)
should be replaced with
L = torch.linalg.eigvalsh(A, UPLO='U' if upper else 'L')
and
L, V = torch.symeig(A, eigenvectors=True)
should be replaced with
L, V = torch.linalg.eigh(A, UPLO='U' if upper else 'L') (Triggered internally at  ../aten/src/ATen/native/BatchLinearAlgebra.cpp:2524.)
  lipschitz_constant = torch.symeig(
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