feat(branch-protection): Push/Reviewer actors can be specified by name

[dion-gionet]

Changes the github_branch_protection resource.

This enables us to use the branch protection resource without using a data block just to retrieve the node ID for users/teams. Node IDs can still be used as an input but you can now use a prefix to define a username or team name

The / prefix defines a user (Ex.: /testuser), the orgname/ prefix defines a team. (Ex.: testorg/team)