try uv only-system

Signed-off-by: emdneto <[email protected]>

Author: emdneto

tox.ini

@@ -165,7 +165,7 @@ setenv =
   CONTRIB_REPO_SHA={env:CONTRIB_REPO_SHA:main}
   CONTRIB_REPO=git+https://github.com/open-telemetry/opentelemetry-python-contrib.git@{env:CONTRIB_REPO_SHA}
   UV_CONFIG_FILE={toxinidir}/tox-uv.toml
-  UV_PYTHON_PREFERENCE="only-managed"
+  UV_PYTHON_PREFERENCE=only-system
   mypy: MYPYPATH={toxinidir}/opentelemetry-api/src/:{toxinidir}/opentelemetry-semantic-conventions/src/:{toxinidir}/opentelemetry-sdk/src/:{toxinidir}/tests/opentelemetry-test-utils/src/
 commands_pre =
   ; In order to get a healthy coverage report,