`ERROR: Python: ImportError: libspqr.so.2: undefined symbol: cholmod_l_metis`

## Python
```python
$ /cvmfs/icecube.opensciencegrid.org/py3-v4.1.1/RHEL_7_x86_64/bin/python3
Python 3.7.5 (default, Jul 24 2020, 21:48:49)
[GCC 9.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import photospline
>>>
```

## PythonCall.jl

```bash
$ env JULIA_CONDAPKG_BACKEND=Null JULIA_PYTHONCALL_EXE=/cvmfs/icecube.opensciencegrid.org/py3-v4.1.1/RHEL_7_x86_64/bin/python3 julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.9.4 (2023-11-14)
_/ |\__'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
```
```julia
julia> using PythonCall

julia> pyimport("math")
Python:

julia> pyimport("photospline")
ERROR: Python: ImportError: /cvmfs/icecube.opensciencegrid.org/py3-v4.1.1/RHEL_7_x86_64/spack/opt/spack/linux-centos7-x86_64/gcc-9.2.0spack/suite-sparse-5.2.0-d7wcgqk77zldo6ndrjuvujv2xvgudsel/lib/libspqr.so.2: undefined symbol: cholmod_l_metis
Python stacktrace: none
Stacktrace:
[1] pythrow()
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/err.jl:94
[2] errcheck
@ ~/.julia/packages/PythonCall/wXfah/src/err.jl:10 [inlined]
[3] pyimport(m::String)
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/concrete/import.jl:11
[4] top-level scope
@ REPL[3]:1
```

Reproduce the failure with the shown JULIA_PYTHONCALL_EXE and JULIA_CONDAPKG_BACKEND settings, then inspect PythonCall's src/err.jl and src/concrete/import.jl around pyimport. Use the photospline import and the reported libspqr.so.2 symbol error as the test case; done means the cause is identified and the demonstrated pyimport("photospline") behavior is resolved or clearly documented.

由索引模型根据 Issue 内容生成。