feat: remove gitlab ci stage input and run job as soon as possible

- Remove the stage input, users can override the `releaser-pleaser` job if needed.
- Run the `releaser-pleaser` job as soon as possible using `needs: []`.

templates/run.yml

@@ -12,14 +12,12 @@ spec:
       description: 'List of files that are scanned for version references.'
       default: ""
 
-    stage:
-      default: build
-      description: 'Defines the build stage'
     # Remember to update docs/reference/gitlab-ci-component.md
 ---
 
 releaser-pleaser:
-  stage: $[[ inputs.stage ]]
+  stage: build
+  needs: []
   rules:
     # There is no way to run a pipeline when the MR description is updated :(
     - if: $CI_COMMIT_BRANCH == "$[[ inputs.branch ]]"