Fix tox compat envs inheriting dev dependency group

Clear dependency_groups in all compat testenvs (numpy, jax, torch,
beartype, optree) to prevent them from inheriting the full dev group
from [testenv]. This was causing torch to be installed in non-torch
envs, leading to spurious test failures in CI.

Author: acecchini

tox.ini

@@ -30,6 +30,7 @@ commands =
 [testenv:numpy{22,23,24}]
 runner = uv-venv-runner
 description = tests with numpy {envname}
+dependency_groups =
 deps =
     pytest
     beartype>=0.22.9
@@ -46,6 +47,7 @@ commands =
 [testenv:jax{05,06,07,08,09}]
 runner = uv-venv-runner
 description = tests with jax {envname}
+dependency_groups =
 deps =
     pytest
     numpy>=2.2.0
@@ -65,6 +67,7 @@ commands =
 [testenv:torch{26,27,28,29,210}]
 runner = uv-venv-runner
 description = tests with torch {envname}
+dependency_groups =
 deps =
     pytest
     numpy>=2.2.0
@@ -84,6 +87,7 @@ commands =
 [testenv:bt{020,021,022}{,-jax,-torch}]
 runner = uv-venv-runner
 description = tests with beartype {envname}
+dependency_groups =
 deps =
     pytest
     numpy>=2.2.0
@@ -102,6 +106,7 @@ commands =
 [testenv:optree{014,015,016,017,018,019}]
 runner = uv-venv-runner
 description = tests with optree {envname}
+dependency_groups =
 deps =
     pytest
     numpy>=2.2.0