We are going to rename tics to tiflash. This requires:

• create a temporary repo tiflash
• duplicate codebase in tiflash
• redirect all ci/cd jobs to new repo
• update github trigger names, ci/cd job names
• update pipeline binary urls
• update ti-chi-bot configs

To keep CI/CD envrionment safe, we should not keep CI/CD scripts in this repo, otherwise, malicious committer can modify the scripts in this repo can attack our internal server.

• find a place to store our build scripts
• modify build-common to use new build scripts location
• find a place to store our ci scripts
• modify CI/CD config