[Improvement][SQL component] support multiple lines of sql

[ntupapaya]

Describe the question
现在sql组件值只支持单条sql，但希望支持多条（通过例如分号分割）

What are the current deficiencies and the benefits of improvement
这里应用场景是说，当sql比较多且联系紧密不可分割的时候，不见得希望每条sql一个流程节点。会过于繁琐。至少在开发阶段希望一起执行和测试。测完了基本功能可以考虑进行适当拆分成多个节点，但也未必到这么细的粒度。

Which version of DolphinScheduler:
-[1.3.4]

Describe alternatives you've considered
虽然群里答复说：
"不支持啊, 因为jdbc只能执行一条sql, 如果是多个sql的话,没有办法做到精确拆分.
举例,以分号拆分";" 如果sql里面有注释, 注释里面包含分号";" 这个不是很好处理.
而且有的sql是按照 换行拆分的并不是按照sql拆分的.
这个你可以提个issue , 看看咋处理...
hive的话,推荐使用 shell 节点. hive -e 执行....
"
但是，

1. 相比直接不支持多行，可以不支持注释，或者不支持注释里有分号，这都可以作为限制，不校验都行，反正写错了运行时就报错呗。
2. shell组件毕竟有一些不便。否则sql组件本身就没有存在的意义了

[zt-1997]

I think it is necessary to support multiple SQL.

[github-actions]

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[github-actions]

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