Update lint flow to use Scale's setup Python

Author: ChrisLovering

.github/workflows/build.yaml

@@ -26,7 +26,7 @@ jobs:
           tag=$(cut -c 1-7 <<< $GITHUB_SHA)
           echo "::set-output name=tag::$tag"
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       # The current version (v2) of Docker's build-push action uses
       # buildx, which comes with BuildKit features that help us speed
@@ -77,7 +77,7 @@ jobs:
       # Check out the private "kubernetes" repository in the `kubernetes`
       # subdirectory using a GitHub Personal Access Token
       - name: Checkout Kubernetes Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: python-discord/kubernetes
           path: kubernetes

.github/workflows/lint-test.yaml

@@ -29,65 +29,17 @@ jobs:
         ports:
           # Maps tcp port 5432 on service container to the host
           - 5432:5432
-    env:
-      # Configure pip to cache dependencies and do a user install
-      PIP_NO_CACHE_DIR: false
-      PIP_USER: 1
-
-      # Make sure package manager does not use virtualenv
-      POETRY_VIRTUALENVS_CREATE: false
-
-      # Specify explicit paths for python dependencies and the pre-commit
-      # environment so we know which directories to cache
-      POETRY_CACHE_DIR: ${{ github.workspace }}/.cache/py-user-base
-      PYTHONUSERBASE: ${{ github.workspace }}/.cache/py-user-base
-      PRE_COMMIT_HOME: ${{ github.workspace }}/.cache/pre-commit-cache
 
     steps:
-      - name: Add custom PYTHONUSERBASE to PATH
-        run: echo '${{ env.PYTHONUSERBASE }}/bin/' >> $GITHUB_PATH
-
       - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Setup python
-        id: python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.9.5'
-
-      # This step caches our Python dependencies. To make sure we
-      # only restore a cache when the dependencies, the python version,
-      # the runner operating system, and the dependency location haven't
-      # changed, we create a cache key that is a composite of those states.
-      #
-      # Only when the context is exactly the same, we will restore the cache.
-      - name: Python Dependency Caching
-        uses: actions/cache@v2
-        id: python_cache
-        with:
-          path: ${{ env.PYTHONUSERBASE }}
-          key: "python-0-${{ runner.os }}-${{ env.PYTHONUSERBASE }}-\
-          ${{ steps.python.outputs.python-version }}-\
-          ${{ hashFiles('./pyproject.toml', './poetry.lock') }}"
-
-      # Install our dependencies if we did not restore a dependency cache
-      - name: Install dependencies using Poetry
-        if: steps.python_cache.outputs.cache-hit != 'true'
-        run: |
-          pip install poetry
-          poetry install
+        uses: actions/checkout@v3
 
-      # This step caches our pre-commit environment. To make sure we
-      # do create a new environment when our pre-commit setup changes,
-      # we create a cache key based on relevant factors.
-      - name: Pre-commit Environment Caching
-        uses: actions/cache@v2
+      - name: Install Python Dependencies
+        uses: HassanAbouelela/actions/setup-python@setup-python_v1.3.2
         with:
-          path: ${{ env.PRE_COMMIT_HOME }}
-          key: "precommit-0-${{ runner.os }}-${{ env.PRE_COMMIT_HOME }}-\
-          ${{ steps.python.outputs.python-version }}-\
-          ${{ hashFiles('./.pre-commit-config.yaml') }}"
+          # Set dev=true to install flake8 extensions, which are dev dependencies
+          dev: true
+          python_version: '3.9'
 
       # We will not run `flake8` here, as we will use a separate flake8
       # action. As pre-commit does not support user installs, we set