Update pypi test script to be less verbose and check for pip breakage

PiperOrigin-RevId: 780089128
Change-Id: Ia7557834f95b9fcfb107fef7fa4e06341bb188e2

Author: jagapiou

.github/workflows/pypi-test.yml

@@ -60,14 +60,15 @@ jobs:
         run: |
           pip install --upgrade pip
           pip install --upgrade setuptools
-          pip install pytest-xdist
 
       - name: Install from PyPI
         run: |
           VERSION="${{github.event.inputs.version}}"
-          pip -vvv install "dm-meltingpot${VERSION:+==$VERSION}"
+          pip install "dm-meltingpot${VERSION:+==$VERSION}"
           pip list
+          pip check
 
       - name: Test installation
         run: |
+          pip install pytest-xdist
           pytest -n auto --pyargs meltingpot