Toolchain: Use curl instead of wget, select matching Starter version

arangodb/ubuntubuildarangodb-devel:15 and later do not include wget by default, and the Starter version was previously hardcoded

Author: Simran-B

.circleci/base_config.yml

@@ -168,7 +168,8 @@ commands:
       - run:
           name: Create archive of compiled instance
           command: |
-            wget -O build/bin/arangodb https://github.com/arangodb-helper/arangodb/releases/download/0.15.8/arangodb-linux-amd64
+            STARTER_VERSION=$(awk -F\" '/^STARTER_REV/ {print $2}' VERSIONS)
+            curl -L -o build/bin/arangodb "https://github.com/arangodb-helper/arangodb/releases/download/$STARTER_VERSION/arangodb-linux-amd64"
             chmod +x build/bin/arangodb
             tar -czf install.tar.gz build/ scripts/ js/ etc/ utils/ enterprise/
       - run: