Revert "Use Gitlab CI job tokens for authentication"

This reverts commit 8d7f9e1e.

common.yml

@@ -3,8 +3,8 @@ stages:
 
 variables:
     TAG: $CI_COMMIT_TAG
-    AUTH: "gitlab-ci-token:${CI_JOB_TOKEN}"
-    REGISTRY_URL: "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/composer"
+    AUTH: "__token__:$REGISTRY_TOKEN"
+    REGISTRY_URL: "$CI_API_V4_URL/projects/$CI_PROJECT_ID/packages/composer"
 
 release:
     stage: release
@@ -14,4 +14,4 @@ release:
         - branches
     image: curlimages/curl
     script:
-        - curl -s -S --fail --data tag=$TAG -u $AUTH $REGISTRY_URL
+        - curl -s -S --fail --data tag=$TAG -u $AUTH $REGISTRY_URL
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