Fix transient CI errors with tox/git retry

CI is intermittently failing when building tox environments.
Mitigate this by including a tox build step with retries before
executing tox commands.

Author: jomcgi

.github/workflows/core_contrib_test_0.yml

@@ -39,6 +39,13 @@ jobs:
       - name: Install tox
         run: pip install tox-uv
 
+      - name: Setup tox with retry
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 2
+          max_attempts: 3
+          command: tox -e {{ job_data.tox_env }} --pkg-only
+
       - name: Run tests
-        run: tox -e {{ job_data.tox_env }} -- -ra
+        run: tox -e {{ job_data.tox_env }} --skip-pkg-install -- -ra
   {%- endfor %}

.github/workflows/generate_workflows_lib/src/generate_workflows_lib/core_contrib_test.yml.j2

@@ -32,6 +32,13 @@ jobs:
       - name: Install tox
         run: pip install tox-uv
 
+      - name: Setup tox with retry
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 10
+          max_attempts: 3
+          command: tox -e {{ job_data.tox_env }} --pkg-only
+
       - name: Run tests
-        run: tox -e {{ job_data.tox_env }}
+        run: tox -e {{ job_data.tox_env }} --skip-pkg-install
   {%- endfor %}

.github/workflows/generate_workflows_lib/src/generate_workflows_lib/lint.yml.j2

@@ -59,8 +59,15 @@ jobs:
       - name: Install tox
         run: pip install tox-uv
 
+      - name: Setup tox with retry
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 10
+          max_attempts: 3
+          command: tox -e {{ job_data }} --pkg-only
+
       - name: Run tests
-        run: tox -e {{ job_data }}
+        run: tox -e {{ job_data }} --skip-pkg-install
       {%- if job_data == "generate-workflows" %}
 
       - name: Check workflows are up to date

.github/workflows/generate_workflows_lib/src/generate_workflows_lib/misc.yml.j2

@@ -31,12 +31,20 @@ jobs:
 
       - name: Install tox
         run: pip install tox-uv
+
+      - name: Setup tox with retry
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 2
+          max_attempts: 3
+          command: tox -e {{ job_data.tox_env }} --pkg-only
+
       {%- if job_data.os == "windows-latest" %}
 
       - name: Configure git to support long filenames
         run: git config --system core.longpaths true
       {%- endif %}
 
       - name: Run tests
-        run: tox -e {{ job_data.tox_env }} -- -ra
+        run: tox -e {{ job_data.tox_env }} --skip-pkg-install -- -ra
   {%- endfor %}