New Platform update for FS S5800-48T4S

[FSSec]

@xinliu-seattle Could you please help me merge the branches on GitHub？

[FSSec]

@xinliu-seattle Please help to review this PR, thank you very much.

Who are we
FS is a global cross-industry network solutions provider in the ICT field, providing full-process services for global data centers, telecoms and all types of enterprises with products and solutions. Our platform is located at fs.com (https://www.fs.com/)
Our broad array of products and services range from hardware and software to integrated IT communications solutions such as security, cloud, hybrid infrastructure, and digital experience. Through highly integrated digital platforms, we can tailor the best solutions to different industry customers in depth according to customer scenarios, helping customers solve various problems in IT network construction, and empowering customers'business decisions.

Why I did it
New Platform Update for FS “S5800-48T4S”

How I did it
Based on the collaboration, the information that can be adapted to our FS “S5800-48T4S” model device was added to Supported-Devices-and-Platforms.html and supported_devices_platforms_md.sh

[guxianghong]

This PR has conflicts, you have to resolve these conflcts before it's been reviewed by community. @FSSec

[FSSec]

@guxianghong I have resolved the PR conflict, please help to review this PR again, thank you very much.

[guxianghong]

@guxianghong I have resolved the PR conflict, please help to review this PR again, thank you very much.

It's LGTM.
Platform S5800-48T4S's code have been merged into sonic-buildimage in PR12994.
Please help to review this PR @xinliu-seattle @zhangyanzhao , Thanks very much.

[FSSec]

Please help to review this PR, thank you very much. @xinliu-seattle