CI: only run backend lint once, not in all test environments

.github/workflows/backend.yml

@@ -115,14 +115,6 @@ jobs:
       if: ${{ matrix.python-version == '3.7' }}
       run: |
         pip install -r test/requirements-37.txt
-    - name: Lint
-      shell: bash
-      run: |
-        bash scripts/lint_backend.sh
-    - name: Typecheck
-      shell: bash
-      run: |
-        bash scripts/type_check_backend.sh
     - name: Build frontend
       shell: bash
       run: |
@@ -137,4 +129,19 @@ jobs:
       run: |
         coverage run -m pytest -m "${{ matrix.test-type }}" --ignore=client
         coverage xml
-
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+          cache: pip
+          cache-dependency-path: test/requirements.txt
+      - name: Install Test Dependencies
+        run: pip install -r test/requirements.txt
+      - name: Lint
+        run: bash scripts/lint_backend.sh
+      - name: Typecheck
+        run: bash scripts/type_check_backend.sh

CHANGELOG.md

@@ -25,7 +25,7 @@ No changes to highlight.
 
 ## Testing and Infrastructure Changes:
 
-No changes to highlight.
+- CI: Python backend lint is only run once, by [@akx](https://github.com/akx) in [PR XXXX](https://github.com/gradio-app/gradio/pull/XXXX)
 
 ## Breaking Changes: