openblas: disable AVX512, make optional

This effectly reverts 383075f38b.

Some AVX512 optimized kernels seem to be broken in openblas.
See https://github.com/NixOS/nixpkgs/issues/124250.

(cherry picked from commit 5946bc724fe4f7f37ba907ae01d851f070fc97e0)

pkgs/development/libraries/science/math/openblas/default.nix

@@ -17,6 +17,10 @@
 , target ? null
 # Select whether DYNAMIC_ARCH is enabled or not.
 , dynamicArch ? null
+# enable AVX512 optimized kernels.
+# These kernels have been a source of trouble in the past.
+# Use with caution.
+, enableAVX512 ? false
 , enableStatic ? stdenv.hostPlatform.isStatic
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
@@ -71,6 +75,7 @@ let
       BINARY = 64;
       TARGET = setTarget "ATHLON";
       DYNAMIC_ARCH = setDynamicArch true;
+      NO_AVX512 = !enableAVX512;
       USE_OPENMP = false;
       MACOSX_DEPLOYMENT_TARGET = "10.7";
     };
@@ -79,6 +84,7 @@ let
       BINARY = 64;
       TARGET = setTarget "ATHLON";
       DYNAMIC_ARCH = setDynamicArch true;
+      NO_AVX512 = !enableAVX512;
       USE_OPENMP = !stdenv.hostPlatform.isMusl;
     };