fix: role errcheck issues (#28544)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

server/.golangci.yml

@@ -91,7 +91,6 @@ issues:
         channels/api4/preference_test.go|\
         channels/api4/reaction_test.go|\
         channels/api4/remote_cluster.go|\
-        channels/api4/role.go|\
         channels/api4/role_test.go|\
         channels/api4/saml.go|\
         channels/api4/scheme.go|\