ci(release): clean deps native compilation artifacts before building production packages

Otherwise dependencies such as fast_html are kept already compiled and not recompiled for native
platform, leading to glibc version issues.

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

.gitlab-ci.yml

@@ -302,6 +302,7 @@ package-app:
   script: &release-script
     - mix local.hex --force
     - mix local.rebar --force
+    - mix deps.clean --all # To avoid reusing native deps, such as lexbor being already built against another environment
     - mix deps.get --only-prod
     - mix compile
     - mix phx.digest.clean --all && mix phx.digest