GHA: move some jobs to ubuntu-slim and arm64

For better efficiency.

Closes #2644

.github/workflows/appveyor_docker.yml

@@ -54,7 +54,7 @@ env:
 jobs:
   daemon:
     name: 'Daemon'
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-26.04-arm
     timeout-minutes: 60
     env:
       SSH_HOST: '${{ github.event.inputs.ssh_host }}'

.github/workflows/appveyor_status.yml

@@ -39,7 +39,7 @@ cache-mode: none
 jobs:
   split:
     name: 'split'
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-26.04-arm
     if: ${{ github.event.sender.login == 'appveyor[bot]' }}
     permissions:
       statuses: write  # To update build statuses

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ env:
 jobs:
   check_style:
     name: 'style-check'
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -39,7 +39,7 @@ jobs:
 
   linters:
     name: 'linters'
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-26.04-arm
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1