Avoid using --extra-index-url for security

mlir/utils/jenkins/Dockerfile

@@ -97,6 +97,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     # ^ pip install pandas... is needed to output performance tests and regenerate test suites
     # Has a copy of the requirements.txt install bit for the new python version
 
+RUN pip3 install --index-url https://test.pypi.org/simple/ hip-python
 # Need "render" group because some CI hosts have /dev/kfd under it.
 RUN groupadd -f render
 

pip_requirements.txt

@@ -1,5 +1,3 @@
---extra-index-url https://test.pypi.org/simple
-hip-python
 tomli==2.0.1
 numpy>=1.19.5, <=2.1.2
 ml_dtypes>=0.1.0, <=0.5.0   # provides several NumPy dtype extensions, including the bf16