Ability to turn off "carry-forwarding" of the reports on a more global scale

[vlad-ko]

What product do you want to improve?
Codecov architecture

Is your feature request related to a problem? Please describe.
A customer has to mange many flags, which is not feasible to do via the yaml file.

Describe the solution you'd like
Perhaps an API endpoint, which customer could fetch, to POST a repot-name and stop it from "carry-forwarding" in the system from that point onwards. Overall the goal is to simplify the way we turn on/off the CFF functionality for the reports. Right now it is quite cumbersome for the customers, because they have to remove the settings from the yaml file, the CI and re-run the whole pipeline to ensure that the "CFF'ed" report is fully removed from the base and consequently feature branches.

Describe alternatives you've considered
Open to any suggestions