[ESD-2180] clang-tidy improvements

[woodfell]

Import new clang-tidy module.

Remove .clang-tidy, it's now automatically generated by ClangTidy.cmake

Any additional changes needed by new common clang-tidy config

[samvrlewis]

Do our clang tidy rules not like 'str' and 'truncate' being in variable names?

[woodfell]

Do our clang tidy rules not like 'str' and 'truncate' being in variable names?

No, it was complaining about different names in the function declaration and definition. I went with the policy of using buf for the "raw" function saving str for the non-raw functions, and trunc rather than truncate since it was more common

[jungleraptor]

LGTM