Merge branch '20870-secret-variables-sorted-by-key' into 'master'

Sort secret keys by key instead of id.

Closes #20870 

See merge request !6275

app/models/ci/variable.rb

@@ -11,6 +11,8 @@ module Ci
       format: { with: /\A[a-zA-Z0-9_]+\z/,
                 message: "can contain only letters, digits and '_'." }
 
+    scope :order_key_asc, -> { reorder(key: :asc) }
+
     attr_encrypted :value,
        mode: :per_attribute_iv_and_salt,
        insecure_mode: true,

app/views/projects/variables/_table.html.haml

@@ -9,7 +9,7 @@
       %th Value
       %th
     %tbody
-      - @project.variables.each do |variable|
+      - @project.variables.order_key_asc.each do |variable|
         - if variable.id?
           %tr
             %td= variable.key