Change actor of context_commits flag to group
What does this MR do and why?
We are rolling out the feature flag by group so we need to change the actor of the feature flag.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #320757 (closed)