Apply clang-format tool in workflow

[winlinvip]

As @pzx601917159 suggested, SRS can use the clang-format tool to format the code, so we don't need to review the coding style in Pull Requests.

Thanks to @chen-guanghua for submitting a Pull Request to support clang-format. See #4366 for details. I have merged this Pull Request.

It will significantly change SRS, which will cause existing Pull Requests to conflict with the develop branch. So I merged this Pull Request but didn't apply the tool to all the code to avoid widespread conflicts.

I also created a no-clang-format branch for those who prefer the coding style without clang-format. Existing PRs can be compared to this branch.

I plan to apply the clang-format tool after the two huge Pull Requests, #4333 and #4349, are merged to minimize conflicts. Then I will merge #4367 and apply the clang-format tool in our workflow by default.

Thanks to everyone who contributed to this idea and implementation!