Add ldap encrypted credentials to the usage_data

Adds usage_data for instances with ldap encrypted credentials in use

changelogs/unreleased/ldap-encrypted-usage-data.yml

+---
+title: Add ldap encrypted credentials to the usage data
+merge_request: 48210
+author:
+type: changed

lib/gitlab/usage_data.rb

@@ -236,7 +236,9 @@ module Gitlab
 
       def system_usage_data_settings
         {
-          settings: {}
+          settings: {
+            ldap_encrypted_secrets_enabled: alt_usage_data(fallback: nil) { Gitlab::Auth::Ldap::Config.encrypted_secrets.active? }
+          }
         }
       end
 

spec/lib/gitlab/usage_data_spec.rb

@@ -1038,6 +1038,14 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
         end
       end
     end
+
+    describe ".system_usage_data_settings" do
+      subject { described_class.system_usage_data_settings }
+
+      it 'gathers settings usage data', :aggregate_failures do
+        expect(subject[:settings][:ldap_encrypted_secrets_enabled]).to eq(Gitlab::Auth::Ldap::Config.encrypted_secrets.active?)
+      end
+    end
   end
 
   describe '.merge_requests_users', :clean_gitlab_redis_shared_state do