Make runners token encryption to be optional

app/models/application_setting.rb

@@ -7,7 +7,7 @@ class ApplicationSetting < ActiveRecord::Base
   include IgnorableColumn
   include ChronicDurationAttribute
-  add_authentication_token_field :runners_registration_token, encrypted: -> { Feature.enabled?(:application_settings_tokens_optional_encryption) ? :optional : :required }
+  add_authentication_token_field :runners_registration_token, encrypted: -> { Feature.enabled?(:application_settings_tokens_optional_encryption, default_enabled: true) ? :optional : :required }
   add_authentication_token_field :health_check_access_token
   DOMAIN_LIST_SEPARATOR = %r{\s*[,;]\s*     # comma or semicolon, optionally surrounded by whitespace

app/models/ci/runner.rb

@@ -10,7 +10,7 @@ module Ci
     include FromUnion
     include TokenAuthenticatable
-    add_authentication_token_field :token, encrypted: -> { Feature.enabled?(:ci_runners_tokens_optional_encryption) ? :optional : :required }
+    add_authentication_token_field :token, encrypted: -> { Feature.enabled?(:ci_runners_tokens_optional_encryption, default_enabled: true) ? :optional : :required }
     enum access_level: {
       not_protected: 0,

app/models/group.rb

@@ -56,7 +56,7 @@ class Group < Namespace
   validates :two_factor_grace_period, presence: true, numericality: { greater_than_or_equal_to: 0 }
-  add_authentication_token_field :runners_token, encrypted: -> { Feature.enabled?(:groups_tokens_optional_encryption) ? :optional : :required }
+  add_authentication_token_field :runners_token, encrypted: -> { Feature.enabled?(:groups_tokens_optional_encryption, default_enabled: true) ? :optional : :required }
   after_create :post_create_hook
   after_destroy :post_destroy_hook

app/models/project.rb

@@ -84,7 +84,7 @@ class Project < ActiveRecord::Base
   default_value_for :snippets_enabled, gitlab_config_features.snippets
   default_value_for :only_allow_merge_if_all_discussions_are_resolved, false
-  add_authentication_token_field :runners_token, encrypted: -> { Feature.enabled?(:projects_tokens_optional_encryption) ? :optional : :required }
+  add_authentication_token_field :runners_token, encrypted: -> { Feature.enabled?(:projects_tokens_optional_encryption, default_enabled: true) ? :optional : :required }
   before_validation :mark_remote_mirrors_for_removal, if: -> { RemoteMirror.table_exists? }