Enable FF ci_bridge_dependency_variables by default

app/models/ci/bridge.rb

@@ -206,7 +206,7 @@ module Ci
 
     override :dependency_variables
     def dependency_variables
-      return [] unless ::Feature.enabled?(:ci_bridge_dependency_variables, project)
+      return [] unless ::Feature.enabled?(:ci_bridge_dependency_variables, project, default_enabled: true)
 
       super
     end

changelogs/unreleased/273734-enable-ci_bridge_dependency_variables.yml

+---
+title: Implement passing dotenv variables to bridge jobs
+merge_request: 47905
+author:
+type: fixed

config/feature_flags/development/ci_bridge_dependency_variables.yml

@@ -4,4 +4,4 @@ introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/46530
 rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/273734
 type: development
 group: group::pipeline authoring
-default_enabled: false
+default_enabled: true