feat: release rdbms on staging (#44576)

fix: unhide cert from settings page

fix: add cert variables where missing

fix: show token on settings page

feat: add challenges to certified user data

fix: stylize settings page a little bit

fix: only show rdbms when upcomingChanges = true

fix: relational databases -> relational database

curriculum/challenges/chinese/00-certifications/relational-database-certification/relational-database-certification.yml

@@ -0,0 +1,22 @@
+---
+id: 606243f50267e718b1e755f4
+title: 关系数据库认证
+certification: relational-database
+challengeType: 7
+isPrivate: true
+tests:
+  - 
+    id: 5f1a4ef5d5d6b5ab580fc6ae
+    title: 天体数据库
+  - 
+    id: 5f9771307d4d22b9d2b75a94
+    title: 世界杯数据库
+  - 
+    id: 5f87ac112ae598023a42df1a
+    title: 沙龙预约计划
+  - 
+    id: 602d9ff222201c65d2a019f2
+    title: 元素周期表数据库
+  - 
+    id: 602da04c22201c65d2a019f4
+    title: 猜数字游戏