[monitoring-template] feat(mysql): add database account expiry metrics (#3969)

Co-authored-by: Logic <zqr10159@dromara.org>
Co-authored-by: Duansg <siguoduan@gmail.com>

hertzbeat-manager/src/main/resources/define/app-mysql.yml

@@ -1178,3 +1178,69 @@ metrics:
         privateKey: ^_^sshPrivateKey^_^
         privateKeyPassphrase: ^_^sshPrivateKeyPassphrase^_^
         shareConnection: ^_^sshShareConnection^_^
+  - name: account_expiry
+    priority: 100
+    i18n:
+      zh-CN: 数据库账号有效期
+      en-US: Account Expiry
+      ja-JP: アカウント有効期限
+    fields:
+      - field: user
+        type: 1
+        label: true
+        i18n:
+          zh-CN: 用户
+          en-US: User
+          ja-JP: ユーザー
+      - field: host
+        type: 1
+        label: true
+        i18n:
+          zh-CN: 主机
+          en-US: Host
+          ja-JP: ホスト
+      - field: days_left
+        type: 0
+        i18n:
+          zh-CN: 剩余天数
+          en-US: Days Left
+          ja-JP: 残り日数
+      - field: password_expired
+        type: 1
+        i18n:
+          zh-CN: 是否已过期
+          en-US: Password Expired
+          ja-JP: 期限切れ
+
+    protocol: jdbc
+    jdbc:
+      host: ^_^host^_^
+      port: ^_^port^_^
+      platform: mysql
+      username: ^_^username^_^
+      password: ^_^password^_^
+      database: mysql
+      timeout: ^_^timeout^_^
+      queryType: multiRow
+      sql: |
+        SELECT
+          user,
+          host,
+          IF(password_lifetime IS NULL,
+             NULL,
+             password_lifetime - DATEDIFF(NOW(), password_last_changed)
+          ) AS days_left,
+          password_expired
+        FROM mysql.user;
+      url: ^_^url^_^
+      sshTunnel:
+        enable: ^_^enableSshTunnel^_^
+        host: ^_^sshHost^_^
+        port: ^_^sshPort^_^
+        timeout: ^_^sshTimeout^_^
+        username: ^_^sshUsername^_^
+        password: ^_^sshPassword^_^
+        privateKey: ^_^sshPrivateKey^_^
+        privateKeyPassphrase: ^_^sshPrivateKeyPassphrase^_^
+        shareConnection: ^_^sshShareConnection^_^
+