(Not) Use setup-uv in CI tests workflow (#4063)

* push a random commit to get a baseline

* install native micromamba + native uv

* trigger uv to run a second time, hopefully cached

* get a benchmark of pip install uv

* remove manual install of build dependencies

* more verbose uv

* remove debug output

.github/workflows/test.yml

@@ -68,25 +68,22 @@ jobs:
         run: |
           micromamba create -n pmg python=${{ matrix.config.python }} --yes
 
-      - name: Install uv
-        run: micromamba run -n pmg pip install uv
-
       - name: Install ubuntu-only conda dependencies
         if: matrix.config.os == 'ubuntu-latest'
         run: |
           micromamba install -n pmg -c conda-forge bader enumlib openff-toolkit packmol pygraphviz tblite --yes
 
-      - name: Install pymatgen and dependencies
+      - name: Install pymatgen and dependencies via uv
         run: |
           micromamba activate pmg
 
+          pip install uv
+
           # TODO1 (use uv over pip) uv install torch is flaky, track #3826
           # TODO2 (pin torch version): DGL library (matgl) doesn't support torch > 2.2.1,
           # see: https://discuss.dgl.ai/t/filenotfounderror-cannot-find-dgl-c-graphbolt-library/4302
           pip install torch==2.2.1
 
-          uv pip install cython setuptools wheel
-
           uv pip install --editable '.[${{ matrix.config.extras }}]' --resolution=${{ matrix.config.resolution }}
 
       - name: Install optional Ubuntu dependencies