Ensure for all workflows we cancel in-progress jobs on repeated pushes

.. no need to keep jobs running if we pushed once more.

Author: tnull

.github/workflows/cln-integration.yml

@@ -2,6 +2,10 @@ name: CI Checks - CLN Integration Tests
 
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   check-cln:
     runs-on: ubuntu-latest

.github/workflows/kotlin.yml

@@ -2,6 +2,10 @@ name: CI Checks - Kotlin Tests
 
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   check-kotlin:
     runs-on: ubuntu-latest

.github/workflows/lnd-integration.yml

@@ -2,6 +2,10 @@ name: CI Checks - LND Integration Tests
 
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   check-lnd:
     runs-on: ubuntu-latest
@@ -49,4 +53,4 @@ jobs:
         run: LND_CERT_PATH=$LND_DATA_DIR/tls.cert LND_MACAROON_PATH=$LND_DATA_DIR/data/chain/bitcoin/regtest/admin.macaroon
           RUSTFLAGS="--cfg lnd_test" cargo test --test integration_tests_lnd -- --exact --show-output
         env:
-          LND_DATA_DIR: ${{ env.LND_DATA_DIR }}
+          LND_DATA_DIR: ${{ env.LND_DATA_DIR }}

.github/workflows/python.yml

@@ -2,6 +2,10 @@ name: CI Checks - Python Tests
 
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   check-python:
     runs-on: ubuntu-latest