(cherry picked from commit cb4ef54a)

* [fix#12439] [Alert] fix send script alert NPE
Co-authored-by: Npandong <100667564+pandong2011@users.noreply.github.com>

* Change the content of alert to an array

* Increase unit test coverage

* Modify the code format

* Modify the code format

* Modify judgment statement

* Deleting invalid References

* Modify the previous code implementation and improve the test data

* Modify the code format

* Move the location of the Content conversion

* Remove useless code

* Change the code format

* Modify unit tests

* Modify unit tests

* Modify unit tests

* Changing the location of the code

* Modify the code
Co-authored-by: Nfanwanlong <fanwanlong@kezaihui.com>
Co-authored-by: N范万龙 <fanwanlong@fanwanlongs-MBP.lan>

* [Fix] Fix the line.separator problem for alert-plugin' test case

* [Fix] Fix the line.separator problem for alert-plugin' test case

(cherry picked from commit 62bd9d2c)

* validate script before alert script

* fix validate script before alert script

* add http alert doc and change body param to unnecessary

* submit http en doc and fix doc

* fix http doc

* fix http alert issues encode before get request

* add hint to http alert

* change email attachment filename to add random string to avoid always use same file

* change email attachment filename to add random string to avoid always use same file

Co-authored-by: NJiajie Zhong <zhongjiajie955@hotmail.com>

* fix wechat issues:
1. change table msg type to markdown.
2. change userId to not required and enrich hints
3. change 'app id' to 'app id and chat id'

* fix wechat issues:
1. revert table showtype and add markdown showtype.
2. enrich hints.
3. delete 'chatid', rename agentid to weChatAgentIdChatId.
4. modify code to send markdown message.

* fix wechat issues: Change the language pack of agentId to agentId/chatId.

* fix format

* fix param name
Co-authored-by: NAmy <amywang0104@163.com>

* fix wechat alert with app and group chat

* add apache header and fix imports

* delete wechat alert 'userSendMsg' property code

* delete wechat alert 'userSendMsg' property code in Test

* delete wechat alert 'userSendMsg' property code in factory Test

* change `getSubWorkFlowParam` from private to protected

* add msgtype in the dingtalk alert plugin

* update markdown msgtype 'at persion'

Co-authored-by: Nqingwli <qingwli@cisco.com>

Co-authored-by: Nqingwli <qingwli@cisco.com>

* DingTalk alarm component adds signature.

* fix code style.

* fix code style.

* add dingtalk document link

* fix DingTalkAlertChannelFactoryTest

* update NAME_DING_TALK_SECRET

* [Refactor] Refactor comments

See https://github.com/apache/dolphinscheduler/issues/7522

* feature_7460

* feature_7460
Co-authored-by: NSbloodyS <sbloodys@qq.com>