Add ability to switch pre-build on/off

[stefanv]

TODO:

• Add test

[czgdp1807]

Seems to be working for me,

(scipy-dev) 23:53:12:~/Quansight/scipy % spin test --no-build
$ export PYTHONPATH="/Users/czgdp1807/Quansight/scipy/build-install/usr/lib/python3.12/site-packages:/Users/czgdp1807/Quansight/scipy/build-install/usr/lib/python3.12/site-packages:"
$ /Users/czgdp1807/mambaforge/envs/scipy-dev/bin/python3.12 -P -c 'import scipy'
$ cd /Users/czgdp1807/Quansight/scipy/build-install/usr/lib/python3.12/site-packages
$ /Users/czgdp1807/mambaforge/envs/scipy-dev/bin/python3.12 -P -m pytest -m 'not slow' --pyargs scipy --pyargs scipy
===================================================== test session starts ======================================================
platform darwin -- Python 3.12.0, pytest-8.3.3, pluggy-1.5.0
rootdir: /Users/czgdp1807/Quansight/scipy
configfile: pytest.ini
plugins: cov-6.0.0, hypothesis-6.121.1, timeout-2.3.1, anyio-4.6.2.post1, xdist-3.6.1
collecting 46905 items                                                                                                         ^collected 48031 items                                                                                                          

Aborted!
(scipy-dev) 23:53:53:~/Quansight/scipy % spin test           
Invoking `build` prior to running tests:
$ meson compile -j 10 -C build
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /Users/czgdp1807/mambaforge/envs/scipy-dev/bin/ninja -C /Users/czgdp1807/Quansight/scipy/build -j 10
ninja: Entering directory `/Users/czgdp1807/Quansight/scipy/build'
[2/338] Generating subprojects/highs/src/HConfig.h with a custom command
$ meson install --only-changed -C build --destdir ../build-install --tags=runtime,python-runtime,tests,devel
^C
Aborted!

So I am approving.

[czgdp1807]

Approving with reference to #272 (comment)

[czgdp1807]

@stefanv Is this PR good to go? It worked well for me.

cc: @rgommers