build: prevent concurrent CI and CQ workflow runs

Use concurrency groups to prevent new runs from being started while a
previous job is already running. This can happen when a lot of unrelated
jobs are pending because of runner exhaustion.

PR-URL: https://github.com/nodejs/node/pull/42016
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

.github/workflows/auto-start-ci.yml

@@ -8,6 +8,8 @@ on:
     # ./doc/contributing/commit-queue.md
     - cron: '*/5 * * * *'
 
+concurrency: ${{ github.workflow }}
+
 env:
   NODE_VERSION: lts/*
 

.github/workflows/commit-queue.yml

@@ -13,6 +13,8 @@ on:
   schedule:
     - cron: '*/5 * * * *'
 
+concurrency: ${{ github.workflow }}
+
 env:
   NODE_VERSION: lts/*