Refine CI configs

Author: bashtage

ci/azure_template_posix.yml

@@ -58,12 +58,15 @@ jobs:
         python.version: '3.10'
         FORMULAIC: 1.0.1
         XXHASH: true
+        PYARROW: true
       python311_latest:
         python.version: '3.11'
         XXHASH: true
+        PYARROW: true
       python312_latest:
         python.version: '3.12'
         XXHASH: true
+        PYARROW: true
       python312_copy_on_write:
         python.version: '3.12'
         XXHASH: true

ci/install-posix.sh

@@ -11,12 +11,12 @@ if [[ -n ${STATSMODELS} ]]; then CMD="$CMD~=${STATSMODELS}"; fi
 if [[ -n ${XARRAY} ]]; then CMD="$CMD xarray~=${XARRAY}"; fi
 if [[ -n ${FORMULAIC} ]]; then CMD="$CMD formulaic~=${FORMULAIC}"; fi
 if [[ -n ${XXHASH} ]]; then CMD="$CMD xxhash"; fi
+if [[ -n ${PYARROW} ]]; then CMD="$CMD pyarrow"; fi
 echo "$CMD"
 eval "$CMD"
 
 if [ "${PIP_PRE}" = true ]; then
-  python -m pip uninstall -y numpy pandas scipy matplotlib statsmodels
-  python -m pip install pyarrow
-  python -m pip install -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy pandas scipy matplotlib --upgrade --use-deprecated=legacy-resolver
+  python -m pip uninstall -y numpy pandas scipy matplotlib statsmodels xarray
+  python -m pip install -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy pandas scipy matplotlib xarray --upgrade --use-deprecated=legacy-resolver
   python -m pip install git+https://github.com/statsmodels/statsmodels.git --upgrade --no-build-isolation -v
 fi