improve gitee mirror jobs

Improve gitee mirror jobs efficiency and reliability

• Maybe two smaller runs 12h apart?
• Seen API rate limit on github: Repo getting failed: {"message":"API rate limit exceeded for 20.115.185.48. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)","documentation_url":"https://docs.github.com/rest/overview/resources-in-the-rest-api#rate-limiting"}
• Maybe randomize the repo list to spread chunks of problematic repos to different jobs?
• Better to remove form list in split-list.py instead of blacklist in main.yml