Pin ios conda dependencies (#87229)
I also pin blas to 1.0 instead of the newer 2.116 available elsewhere (https://anaconda.org/conda-forge/blas)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87229
Approved by: https://github.com/izaitsevfb, https://github.com/ZainRizvi, https://github.com/malfet
