Add mechanism for turning on daily output in test suite

The [`defaultio`](https://github.com/ESCOMP/CESM/tree/cesm2_3_beta17/cime_config/testmods_dirs/allactive/defaultio) test in CESM writes daily history files for CAM, CICE, CISM, CLM, MOSART, POP, and RTM. It would be nice to have an ability to adjust the MOM `diag_table` for this test.

I proposed to @jedwards4b that we could add a `DAILY_OUTPUT` variable to `env_test.xml` (default=`FALSE`), and when `DAILY_OUTPUT=TRUE` ParamGen would modify the diag table accordingly, but I am open to other methods of getting daily MOM output into the test suite.

检查 cime_config/testmods_dirs/allactive/defaultio 中的 defaultio 测试以及提议的 env_test.xml 设置。跟踪 ParamGen 如何处理 MOM diag_table，然后确定如何让该测试启用 MOM 每日输出，同时默认禁用 DAILY_OUTPUT。完成标准是 defaultio 测试在不更改其他测试的情况下生成每日 MOM 历史文件。

由索引模型根据 Issue 内容生成。