Provide instance level setting to enable or disable "default branch protection" at the group level for group owners
Follow up to: !24426 (merged)
Proposal:
Have an instance level setting that instance admins can enable or disable.
When enabled: Allow group owners to update the default branch protection setting at the group level. Instance admins should also be able to update this setting at the group level.
When disabled: Do not allow group owners to update the default branch protection setting at the group level. But Instance admins should still be able to update this setting at the group level.