Use .env.sentry-build-plugin for Sentry auth token (#5292)

* Use .env.sentry-build-plugin for auth token

* Test if release works on pull request

* Revert the test code

frontend/Dockerfile

@@ -50,7 +50,8 @@ ENV SEMANTIC_VERSION=${SEMANTIC_VERSION}
 # Use the Sentry auth token secret to send the sourcemaps to Sentry only if the secret is provided
 RUN --mount=type=secret,id=sentry_auth_token,mode=0444 \
     sh -c 'if [ -f /run/secrets/sentry_auth_token ]; then \
-      SENTRY_AUTH_TOKEN="$(cat /run/secrets/sentry_auth_token)"; \
+      SENTRY_AUTH_TOKEN="$(cat /run/secrets/sentry_auth_token)" && \
+      echo "SENTRY_AUTH_TOKEN=$SENTRY_AUTH_TOKEN" >> .env.sentry-build-plugin && \
       echo "Using Sentry Auth Token: $SENTRY_AUTH_TOKEN"; \
     else \
       echo "No Sentry Auth Token provided"; \