Update OpenBLAS to 0.3.28 (pytorch#137263)

This includes a number of performance improvements, such as threading optimisations and forwarding GEMM calls to GEMV for calls where N=1 or M=1.

See: https://github.com/OpenMathLib/OpenBLAS/releases

Pull Request resolved: pytorch#137263
Approved by: https://github.com/malfet

Author: Mousius

.ci/docker/common/install_conda.sh

@@ -65,7 +65,7 @@ if [ -n "$ANACONDA_PYTHON_VERSION" ]; then
 
   # Install PyTorch conda deps, as per https://github.com/pytorch/pytorch README
   if [[ $(uname -m) == "aarch64" ]]; then
-    conda_install "openblas==0.3.25=*openmp*"
+    conda_install "openblas==0.3.28=*openmp*"
   else
     conda_install "mkl=2021.4.0 mkl-include=2021.4.0"
   fi

.ci/docker/common/install_openblas.sh

@@ -4,7 +4,7 @@
 set -ex
 
 cd /
-git clone https://github.com/OpenMathLib/OpenBLAS.git -b v0.3.25 --depth 1 --shallow-submodules
+git clone https://github.com/OpenMathLib/OpenBLAS.git -b v0.3.28 --depth 1 --shallow-submodules
 
 
 OPENBLAS_BUILD_FLAGS="