Allow for users other than the requestor (or admin) to edit a scheduled change.

When they schedule and approve a flag change, only the requestor can modify it after it's approved. If someone is OOO, we are running into challenges updating scheduled changes.

Current state allows a user to make a change to targeting rules and schedule that change for a later date. Now imagine sometime between the change request and the scheduled release, stakeholders made a decision to postpone that rollout. The requestor is not reachable and it seems that no one other than the requestor can cancel that scheduled change--not the owners, not the approvers, not even a platform admin. This now becomes a sort of "ticking time-bomb", as the change is now inevitable, leaving the team helpless.

Preferably, we'd like to expand the pool of folks that can cancel that scheduled change. We understand that the "owners" field on a flag has gradually been reframed to be a metadata field instead of a permissions-based field and so it would not be appropriate to include those users, but maybe there are some other creative ways to expand on this feature. Additionally, it may be helpful to have a platform admin break-glass action.

I'd like the ability for admins to reject, remove, or modify pending and scheduled change requests, especially when original submitters or approvers aren't available, to keep our processes running smoothly without delays.