Allow to use FF to configure `/builds` folder
What does this MR do?
Adds a FF to allow to fallback to previous behavior of
/builds folder for docker
where we would cache
/builds/group instead of
/builds as of %11.10.
Does this MR meet the acceptance criteria?
- Documentation created/updated
- Added tests for this feature/bug
In case of conflicts with
master- branch was rebased
What are the relevant issue numbers?
Help with #4174 (comment 161996599)