fix(ct): avoid costly lookup of Java version to be used via Maven, gr…

…ep from XML instead

.github/workflows/container_base_push.yml

@@ -63,7 +63,7 @@ jobs:
                   ref: ${{ matrix.branch }}
             - name: Determine Java version from package
               run: |
-                  echo "JAVA_VERSION=$(mvn -f modules/container-base -Pct help:evaluate -Dexpression=target.java.version -q -DforceStdout)" >> ${GITHUB_ENV}
+                  echo "JAVA_VERSION=$(grep '<target.java.version>' modules/dataverse-parent/pom.xml | cut -f2 -d'>' | cut -f1 -d'<')" >> ${GITHUB_ENV}
 
             - name: Set up JDK ${{ env.JAVA_VERSION }}
               uses: actions/setup-java@v4