[build] run workflows on merge group event (#8303)

Signed-off-by: Sally MacFarlane <macfarla.github@gmail.com>

.github/workflows/acceptance-tests.yml

@@ -1,12 +1,12 @@
 name: acceptance-tests
 on:
   workflow_dispatch:
+  merge_group:
   pull_request:
     branches:
       - main
       - release-*
       - verkle
-      - gh-readonly-queue/main/pr-*
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

.github/workflows/integration-tests.yml

@@ -1,12 +1,12 @@
 name: integration-tests
 on:
   workflow_dispatch:
+  merge_group:
   pull_request:
     branches:
       - main
       - release-*
       - verkle
-      - gh-readonly-queue/main/pr-*
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

.github/workflows/pre-review.yml

@@ -1,12 +1,12 @@
 name: pre-review
 
 on:
+  merge_group:
   pull_request:
     branches:
       - main
       - release-*
       - verkle
-      - gh-readonly-queue/main/pr-*
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

.github/workflows/reference-tests.yml

@@ -1,12 +1,12 @@
 name: reference-tests
 on:
   workflow_dispatch:
+  merge_group:
   pull_request:
     branches:
       - main
       - release-*
       - verkle
-      - gh-readonly-queue/main/pr-*
 
 env:
   GRADLE_OPTS: "-Xmx6g -Dorg.gradle.daemon=false -Dorg.gradle.parallel=true -Dorg.gradle.caching=true"