Why I did it
Cherry-pick commits from master to support the snapshot based mirror, and fix the code conflicts.
ad162ae [Build] Optimize the version control for Debian packages (#14557)
38c5d7f [Build] Support j2 template for debian sources for docker ptf (#13198)
5e4826e [Ci] Support to use the same snapshot for all platform builds (#13913)
8206925 [Build] Change the default mirror version config file (#13786)
5e4a866 [Build] Support Debian snapshot mirror to improve build stability (#13097)
ac5d89c [Build] Support j2 template for debian sources (#12557)
Work item tracking
Microsoft ADO (number only): 18018114
How I did it
How to verify it
