Sanitize user home on GitHub Action job start on Atlas

(cherry picked from commit 4e8eb91562)

.github/ci-prerequisites-atlas.sh

@@ -0,0 +1,6 @@
+# Reclaims disk space and sanitizes user home on Atlas infrastructure
+
+# We use the GitHub cache for the relevant parts of these directories.
+# Also, we do not want to keep things like ~/.gradle/build-scan-data.
+rm -rf ~/.gradle/
+rm -rf ~/.m2/

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
         if: "${{ github.event_name == 'pull_request' && !cancelled() }}"
         with:
           name: build-scan-data-${{ matrix.rdbms }}
-          path: build-scan-data.tgz
+          path: ~/.gradle/build-scan-data
 
       - name: Upload test reports (if Gradle failed)
         uses: actions/upload-artifact@v4
@@ -130,8 +130,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - name: Reclaim Disk Space
-        run: .github/ci-prerequisites.sh
+      - name: Reclaim disk space and sanitize user home
+        run: .github/ci-prerequisites-atlas.sh
       - name: Start database
         env:
           RDBMS: ${{ matrix.rdbms }}