sysconfig has wrong values for ppc64le

### Solution to issue cannot be found in the documentation.

- [X] I checked the documentation.

### Issue

sysconfig appears to not get set up correctly when cross-compiling to linux-ppc64le. This has consequences, especially for pypy builds, where e.g. an empty EXT_SUFFIX prevents modules being imported.

Attempting to run `$PYTHON -m sysconfig` to debug values, I see [this error](https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=880609&view=logs&j=b7a895b1-8909-5023-4a22-40a4698fe576&t=821caef9-b8fa-5ab7-47a2-7e7cdae7737e&l=791) on the CPython builds:

```
ModuleNotFoundError: No module named '_sysconfigdata__linux_powerpc64le-linux-gnu'
```

but on pypy3.9, it produces [incorrect output](https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=880609&view=logs&j=bb161906-9c9f-5a9b-90ad-afa0705db589&t=ad4acc78-fd09-5692-d435-737c1de4d647&l=815):

EXT_SUFFIX = ".pypy39-pp73-x86_64-linux-gnu.so"

In all ppc cases, CMake's Python_SOABI is incorrectly empty which results in building with scikit-build-core producing `extmodule.so` instead of the correct `extmodule.pypy39-pp73-ppc_64-linux-gnu.so`. This doesn't ultimately fail on CPython because `module.so` is a vaild import name in CPython, but not PyPy.

aarch64 builds don't have this issue, producing correctly:

```
EXT_SUFFIX = ".pypy39-pp73-aarch64-linux-gnu.so"
```

so it is specific to ppc, not cross-compiling in general.

My hunch is it has to do with the fact that ppc64le has 3 names:

- `ppc64le`
- `powerpc64le`
- `ppc_64` (first in `_imp.extension_suffixes()`, which populates SOABI, EXT_SUFFIX on PyPy)

but I don't know if the issue is here or in crossenv itself or somewhere else.

### Installed packages

```shell
_libgcc_mutex: 0.1-conda_forge conda-forge
_openmp_mutex: 4.5-2_gnu conda-forge
_sysroot_linux-ppc64le_curr_repodata_hack: 4-h43410cf_14 conda-forge
binutils_impl_linux-64: 2.40-hf600244_0 conda-forge
binutils_impl_linux-ppc64le: 2.40-hef43fe1_0 conda-forge
binutils_linux-ppc64le: 2.40-h631d6fd_2 conda-forge
bzip2: 1.0.8-hd590300_5 conda-forge
c-ares: 1.26.0-hd590300_0 conda-forge
ca-certificates: 2024.2.2-hbcca054_0 conda-forge
cffi: 1.16.0-1_pypy39 conda-forge
cmake: 3.28.3-hcfe8598_0 conda-forge
cross-python_linux-ppc64le: 3.9-41_73_pypy conda-forge
crossenv: 1.4.0-pyhd8ed1ab_0 conda-forge
expat: 2.5.0-hcb278e6_1 conda-forge
gcc_impl_linux-64: 12.3.0-he2b93b0_5 conda-forge
gcc_impl_linux-ppc64le: 12.3.0-h783c3ad_5 conda-forge
gcc_linux-ppc64le: 12.3.0-h7a1d020_2 conda-forge
gdbm: 1.18-h0a1914f_2 conda-forge
gxx_impl_linux-64: 12.3.0-he2b93b0_5 conda-forge
gxx_impl_linux-ppc64le: 12.3.0-h783c3ad_5 conda-forge
gxx_linux-ppc64le: 12.3.0-hbee9562_2 conda-forge
kernel-headers_linux-64: 2.6.32-he073ed8_17 conda-forge
kernel-headers_linux-ppc64le: 3.10.0-h23d7e6c_14 conda-forge
keyutils: 1.6.1-h166bdaf_0 conda-forge
krb5: 1.21.2-h659d440_0 conda-forge
ld_impl_linux-64: 2.40-h41732ed_0 conda-forge
ld_impl_linux-ppc64le: 2.40-h2f009d6_0 conda-forge
libcurl: 8.5.0-hca28451_0 conda-forge
libedit: 3.1.20191231-he28a2e2_2 conda-forge
libev: 4.33-hd590300_2 conda-forge
libexpat: 2.5.0-hcb278e6_1 conda-forge
libffi: 3.4.2-h7f98852_5 conda-forge
libgcc-devel_linux-64: 12.3.0-h8bca6fd_105 conda-forge
libgcc-devel_linux-ppc64le: 12.3.0-h227d28a_5 conda-forge
libgcc-ng: 13.2.0-h807b86a_5 conda-forge
libgomp: 13.2.0-h807b86a_5 conda-forge
libiconv: 1.17-hd590300_2 conda-forge
libnghttp2: 1.58.0-h47da74e_1 conda-forge
libsanitizer: 12.3.0-h0f45ef3_5 conda-forge
libsqlite: 3.45.1-h2797004_0 conda-forge
libssh2: 1.11.0-h0841786_0 conda-forge
libstdcxx-devel_linux-64: 12.3.0-h8bca6fd_105 conda-forge
libstdcxx-devel_linux-ppc64le: 12.3.0-h227d28a_5 conda-forge
libstdcxx-ng: 13.2.0-h7e041cc_5 conda-forge
libuv: 1.47.0-hd590300_0 conda-forge
libxcb: 1.15-h0b41bf4_0 conda-forge
libzlib: 1.2.13-hd590300_5 conda-forge
lz4-c: 1.9.4-hcb278e6_0 conda-forge
make: 4.3-hd18ef5c_1 conda-forge
ncurses: 6.4-h59595ed_2 conda-forge
openssl: 3.2.1-hd590300_0 conda-forge
pkg-config: 0.29.2-h36c2ea0_1008 conda-forge
popt: 1.16-h0b475e3_2002 conda-forge
pthread-stubs: 0.4-h36c2ea0_1001 conda-forge
pypy3.9: 7.3.15-h9557127_0 conda-forge
python: 3.9.18-1_73_pypy conda-forge
python_abi: 3.9-4_pypy39_pp73 conda-forge
readline: 8.2-h8228510_1 conda-forge
rhash: 1.4.4-hd590300_0 conda-forge
rsync: 3.2.7-h70740c4_0 conda-forge
sed: 4.8-he412f7d_0 conda-forge
sqlite: 3.45.1-h2c6b66d_0 conda-forge
sysroot_linux-64: 2.12-he073ed8_17 conda-forge
sysroot_linux-ppc64le: 2.17-h23d7e6c_14 conda-forge
tk: 8.6.13-noxft_h4845f30_101 conda-forge
tzdata: 2024a-h0c530f3_0 conda-forge
xorg-kbproto: 1.0.7-h7f98852_1002 conda-forge
xorg-libx11: 1.8.7-h8ee46fc_0 conda-forge
xorg-libxau: 1.0.11-hd590300_0 conda-forge
xorg-libxdmcp: 1.1.3-h7f98852_0 conda-forge
xorg-xextproto: 7.3.0-h0b41bf4_1003 conda-forge
xorg-xproto: 7.0.31-h7f98852_1007 conda-forge
xxhash: 0.8.0-h7f98852_3 conda-forge
xz: 5.2.6-h166bdaf_0 conda-forge
zlib: 1.2.13-hd590300_5 conda-forge
zstd: 1.5.5-hfc55251_0 conda-forge
```

### Environment info

```shell
active environment : base
active env location : /opt/conda
shell level : 1
user config file : /home/conda/.condarc
populated config files : /opt/conda/.condarc
/home/conda/.condarc
conda version : 23.11.0
conda-build version : 3.28.4
python version : 3.10.13.final.0
solver : libmamba (default)
virtual packages : __archspec=1=broadwell
__conda=23.11.0=0
__glibc=2.17=0
__linux=6.2.0=0
__unix=0=0
base environment : /opt/conda (writable)
conda av data dir : /opt/conda/etc/conda
conda av metadata url : None
channel URLs : https://conda.anaconda.org/conda-forge/linux-64
https://conda.anaconda.org/conda-forge/noarch
package cache : /home/conda/feedstock_root/build_artifacts/pkg_cache
/opt/conda/pkgs
envs directories : /opt/conda/envs
/home/conda/.conda/envs
platform : linux-64
user-agent : conda/23.11.0 requests/2.31.0 CPython/3.10.13 Linux/6.2.0-1019-azure centos/7.9.2009 glibc/2.17 solver/libmamba conda-libmamba-solver/24.1.0 libmambapy/1.5.6
UID:GID : 1001:1001
netrc file : None
offline mode : False
```