chore(ci): avoid concurrent tfstate locking

Author: iru

.github/workflows/ci-integration-cleanup-force.yaml

@@ -7,6 +7,7 @@ name: CI - Integration Tests - Cleanup
 on:
   workflow_dispatch
 
+concurrency: terraform
 jobs:
   test_cleanup:
     name: Test Cleanup

.github/workflows/ci-integration-tests.yaml

@@ -9,6 +9,7 @@ on:
       - master
     paths:
       - '**.tf'
+concurrency: terraform
 jobs:
   integration_test:
     name: Test-Kitchen