Enabled monaco_ci by default

Following the enablement through chatops, this commit enables
the feature flag by default in the code base

app/views/projects/ci/lints/show.html.haml

 - page_title _("CI Lint")
 - page_description _("Validate your GitLab CI configuration file")
-- unless Feature.enabled?(:monaco_ci)
+- unless Feature.enabled?(:monaco_ci, default_enabled: true)
   - content_for :library_javascripts do
     = page_specific_javascript_tag('lib/ace.js')
 
@@ -17,7 +17,7 @@
           .file-holder
             .js-file-title.file-title.clearfix
               = _("Contents of .gitlab-ci.yml")
-            - if Feature.enabled?(:monaco_ci)
+            - if Feature.enabled?(:monaco_ci, default_enabled: true)
               .file-editor.code
                 .js-edit-mode-pane.qa-editor#editor{ data: { 'editor-loading': true } }<
                   %pre.editor-loading-content= params[:content]

config/feature_flags/development/monaco_ci.yml

 ---
 name: monaco_ci
-introduced_by_url: 
-rollout_issue_url: 
-group: 
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/23666
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/249137
+group: group::editor
 type: development
-default_enabled: false
+default_enabled: true

lib/gitlab/gon_helper.rb

@@ -45,7 +45,7 @@ module Gitlab
       # made globally available to the frontend
       push_frontend_feature_flag(:snippets_vue, default_enabled: true)
       push_frontend_feature_flag(:monaco_blobs, default_enabled: true)
-      push_frontend_feature_flag(:monaco_ci, default_enabled: false)
+      push_frontend_feature_flag(:monaco_ci, default_enabled: true)
       push_frontend_feature_flag(:snippets_edit_vue, default_enabled: true)
       push_frontend_feature_flag(:webperf_experiment, default_enabled: false)
       push_frontend_feature_flag(:snippets_binary_blob, default_enabled: false)