test: remove jax-using unit tests; assertions moved to autolens_workspace_test (#295)

Unit tests in test_autoarray/ that imported jax (directly via importorskip
or indirectly via library helpers like ImagingSparseOperator and the KNN
interpolator) caused two problems: they broke the no-jax CI matrix on
Python 3.9 / 3.10, and they paid the jax import cost on every local run
even when self-skipping. Per the project rule "library unit tests stay
numpy-only; cross-xp checks live in workspace_test", move all 9 jax
assertions into autolens_workspace_test/scripts/jax_assertions/.

Library code unchanged. Conftest's collect_ignore_glob for test_jax_*.py
removed since no such files remain (test_jax_changes.py renamed to
test_changes.py since it never used jax in the first place).

Co-authored-by: Jammy2211 <[email protected]>
Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>

Author: 3 people

test_autoarray/conftest.py

@@ -1,4 +1,3 @@
-import importlib.util
 import os
 from os import path
 import pytest
@@ -7,13 +6,6 @@
 from autoarray import fixtures
 from autoconf import conf
 
-# Skip JAX-only tests when jax isn't installed. find_spec checks availability
-# WITHOUT importing the module, so this conftest stays numpy-only per the
-# "library unit tests stay numpy-only" rule.
-collect_ignore_glob = []
-if importlib.util.find_spec("jax") is None:
-    collect_ignore_glob = ["test_jax_*.py", "**/test_jax_*.py"]
-
 
 class PlotPatch:
     def __init__(self):