Always lint before running tests (#2557)

Author: yorickdowne

.github/workflows/lint.yml

@@ -2,10 +2,13 @@ name: Lint sources
 run-name: Lint sources
 
 on:
-  push:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   lint:
     runs-on: ubuntu-latest

.github/workflows/test-client-combos.yml

@@ -11,9 +11,40 @@ on:
     types: [opened, synchronize, labeled, unlabeled]
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
+  lint:
+    name: Lint sources
+    if: |
+      (
+        contains(join(github.event.pull_request.labels.*.name, ','), 'test-') &&
+        !contains(github.event.pull_request.labels.*.name, 'test-ethd') &&
+        !contains(github.event.pull_request.labels.*.name, 'test-grafana') &&
+        !contains(github.event.pull_request.labels.*.name, 'test-nimbus-proxy') &&
+        !contains(github.event.pull_request.labels.*.name, 'test-web3signer')
+      )
+      || github.event_name == 'push'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Docker buildx
+        uses: docker/setup-buildx-action@v4
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: 3.14
+          cache: 'pip'
+      - name: Lint sources
+        uses: pre-commit/action@v3.0.1
+        with:
+          extra_args: --all-files --show-diff-on-failure
+
   test-client-combo:
     runs-on: ubuntu-latest
+    needs: lint
     strategy:
       matrix:
         combo:

.github/workflows/test-ethd.yml

@@ -6,10 +6,15 @@ defaults:
 
 on:
   push:
+    branches: [main]
   pull_request:
     types: [opened, synchronize, labeled, unlabeled]
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test-ethd:
     if: |

.github/workflows/test-grafana.yml

@@ -6,10 +6,15 @@ defaults:
 
 on:
   push:
+    branches: [main]
   pull_request:
     types: [opened, synchronize, labeled, unlabeled]
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test-grafana:
     if: |

.github/workflows/test-nimbus-proxy.yml

@@ -6,10 +6,15 @@ defaults:
 
 on:
   push:
+    branches: [main]
   pull_request:
     types: [opened, synchronize, labeled, unlabeled]
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test-nimbus-proxy:
     if: |