CI: exclude linting dependencies from the unittest environment. (#8861)

* Remove redundant tox install step.

* Clone primer packages if not found in projects-cache (created on main branch).

Author: mbyrnepr2

.github/workflows/checks.yaml

@@ -63,6 +63,7 @@ jobs:
           python -m pip install -U pip setuptools wheel
           pip install -U -r requirements_test.txt
           pip install -U -r doc/requirements.txt
+          pip install pre-commit
       - name: Generate pre-commit restore key
         id: generate-pre-commit-key
         run: >-
@@ -173,11 +174,9 @@ jobs:
           key:
             ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
             needs.prepare-base.outputs.python-key }}
-      - name: Install tox
-        run: |
-          pip install -U tox
       - name: Run checks on documentation code examples
         run: |
+          . venv/bin/activate
           tox -e test_doc
       - name: Check documentation build and links
         run: |

.github/workflows/primer_run_pr.yaml

@@ -140,6 +140,11 @@ jobs:
           key: >-
             ${{ runner.os }}-${{ matrix.python-version }}-${{
             steps.commitstring.outputs.commitstring }}-primer
+      - name: Regenerate cache
+        if: steps.cache-projects.outputs.cache-hit != 'true'
+        run: |
+          . venv/bin/activate
+          python tests/primer/__main__.py prepare --clone
       - name: Check cache
         run: |
           . venv/bin/activate

requirements_test.txt

@@ -1,4 +1,3 @@
--r requirements_test_pre_commit.txt
 -r requirements_test_min.txt
 coverage~=7.2
 tbump~=6.10.0