build: add source in persisted workspace for integration tests

Co-Authored-By: Leonardo Di Donato <leodidonato@gmail.com>
Signed-off-by: Lorenzo Fontana <lo@linux.com>

.circleci/config.yml

@@ -55,9 +55,10 @@ jobs:
           name: Build packages
           command: /usr/bin/entrypoint package
       - persist_to_workspace:
-          root: /build
+          root: /
           paths:
-            - release
+            - build/release
+            - source
       - run:
           name: Prepare artifacts
           command: |
@@ -78,10 +79,8 @@ jobs:
           BUILD_TYPE: "release"
     steps:
       - setup_remote_docker
-      - checkout:
-          path: /source/falco
       - attach_workspace:
-          at: /build
+          at: /
       - run:
           name: Execute integration tests
           command: /usr/bin/entrypoint test