Resturcture the analytics_platform modules.

[sara-02]

Current structure of the analytics module is based on the structure that each module has its own code and test folders. But with the code folders unfied under this PR, we now have a redundant layer of src folder. That can be restructured for simplicity.

Sample of current structure

analytics_platform
│   Kronos
│   └───module
│            └───src
│                       file.txt

Desired structure

analytics_platform
│   Kronos
│   └───module
│               file.txt