To add a new FCV release (e.g. SERVER-129707), an engineer has to perform a series of mechanical tasks, which include:

•  adding the new constant in the releases.yml files
• adding the requires_fcv_XXX tag as the list of excluded tags
• upgrading the hardcoded version numbers in a few specific files

I am purposefully limiting the scope of this ticket to just the mechanical parts, as activities like the above include also running tests, excluding the ones which need to be changed/removed due to the upgrade of FCV constants, and cutting tickets to the owning teams.