`LinearAlgebra.BLAS.vendor()` has been deprecated

It looks like the `vendor()` function is deprecated in the following line of code:

https://github.com/JuliaPy/PyCall.jl/blob/9a084eb47c7176242893dd18a1782a1114cef02c/src/numpy.jl#L67

```
julia> import PyCall; PyCall.pyimport("jax").numpy.array([1.0])
┌ Warning: `vendor()` is deprecated, use `BLAS.get_config()` and inspect the output instead
│ caller = npyinitialize() at numpy.jl:67
└ @ PyCall ~/.julia/dev/PyCall/src/numpy.jl:67
...
```
I'm on python 3.9.9, numpy 1.21.4, Julia 1.7.1, and [438e738f] PyCall v1.93.0. This is running on NixOS 21.11.
```
julia> versioninfo()
Julia Version 1.7.1
Commit ac5cc99908 (2021-12-22 19:35 UTC)
Platform Info:
OS: Linux (x86_64-pc-linux-gnu)
CPU: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-12.0.1 (ORCJIT, skylake-avx512)
```
Here's my shell.nix to reproduce the whole thing:
```nix
let
# Last updated: 1/10/22. From status.nixos.org.
pkgs = import (fetchTarball ("https://github.com/NixOS/nixpkgs/archive/8928525bd8b8cdc1235a92a89b72cbbe5bd8a00d.tar.gz")) { };
in
pkgs.mkShell {
buildInputs = with pkgs; [
# See https://github.com/NixOS/nixpkgs/issues/66716. Necessary for julia to
# be able to download packages.
cacert

julia_17-bin

python3
python3Packages.jax
python3Packages.jaxlib
];

# See https://github.com/JuliaPy/PyCall.jl/issues/952#issuecomment-1005694327
PYTHON = "${pkgs.python3}/bin/python";
}
```

src/numpy.jl の 67 行目から始めます。ここで npyinitialize() が LinearAlgebra.BLAS.vendor() の非推奨警告を発生させます。報告されている Julia および PyCall.pyimport("jax").numpy.array([1.0]) コマンドで問題を再現し、その後、NumPy/JAX のインポートが引き続き機能する状態で警告がなくなっていることを確認します。

索引モデルが issue の本文から書いたものです。