test delte cache

Author: xiaoguoguo626807

.github/workflows/_unit_test_coverage.yml

@@ -239,6 +239,9 @@ jobs:
           else
               echo "Warning: tests/plugins directory not found, skipping setup.py install"
           fi
+          python -m pip cache remove transformers
+          python -m pip cache remove paddleformers
+          python -m pip cache remove fastdeploy-gpu
           python -m pip install paddleformers[paddlefleet]==1.1.0.dev20260507 --extra-index-url https://www.paddlepaddle.org.cn/packages/stable/cu126/ --extra-index-url https://www.paddlepaddle.org.cn/packages/nightly/cu126/
           python -m pip uninstall paddlepaddle-gpu -y || true
           python -m pip install --pre paddlepaddle-gpu -i https://www.paddlepaddle.org.cn/packages/nightly/cu126/