gh-36418: .github/workflows/docker.yml: Free more disk space
    
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Replacing a step of our `docker.yml` with a well-maintained action with
the same purpose.

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URL: #36418
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee

Author: Release Manager

.github/workflows/docker.yml

@@ -144,24 +144,23 @@ jobs:
       EXTRA_CONFIGURE_ARGS: --enable-fat-binary
       EXTRA_SAGE_PACKAGES:  ${{ inputs.extra_sage_packages }}
     steps:
+      - name: Maximize build disk space
+        uses: easimon/maximize-build-space@v8
+        with:
+          # need space in /var for Docker images
+          root-reserve-mb:      40000
+          remove-dotnet:        true
+          remove-android:       true
+          remove-haskell:       true
+          remove-codeql:        true
+          remove-docker-images: true
+        if: inputs.free_disk_space
       - name: Check out SageMath
         uses: actions/checkout@v4
         with:
           repository: ${{ inputs.sage_repo }}
           ref: ${{ inputs.sage_ref }}
           fetch-depth: 10000
-      - name: free disk space
-        run: |
-          df -h
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt-get clean
-          docker rmi $(docker image ls -aq)
-          echo "Largest packages:"
-          dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n | tail -n 50
-          sudo apt-get --fix-broken --yes remove $(dpkg-query -f '${Package}\n' -W | grep -E '^(ghc-|google-cloud-sdk|google-chrome|firefox|mysql-server|dotnet-sdk|hhvm|mono)') || echo "(error ignored)"
-          df -h
-        if: inputs.free_disk_space
       - name: Download upstream artifact
         uses: actions/download-artifact@v3
         with:
@@ -216,7 +215,10 @@ jobs:
           .ci/merge-fixes.sh
         env:
           GH_TOKEN: ${{ github.token }}
-
+      - name: Show disk space
+        run: |
+          df -h
+        if: inputs.free_disk_space
       - name: Configure and build Sage distribution within a Docker container
         run: |
           set -o pipefail; EXTRA_DOCKER_BUILD_ARGS="--build-arg NUMPROC=4 --build-arg USE_MAKEFLAGS=\"-k V=0 SAGE_NUM_THREADS=3\"" tox -e $TOX_ENV -- $TARGETS 2>&1 | sed "/^configure: notice:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: warning:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: error:/s|^|::error file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;"