MM-10264: Adds CLI command to import and export permissions. (#8787)

* MM-10264: Adds CLI command to import and export permissions.

* MM-10264: Changes Scheme Name to DisplayName and adds Name slug field.

* MM-10264: Changes display name max size.

* MM-10264: Another merge fix.

* MM-10264: Changes for more Schemes methods checking for migration.

* MM-10264: More updates for Schemes migration checking.

api4/channel_test.go

@@ -1924,13 +1924,15 @@ func TestUpdateChannelScheme(t *testing.T) {
 	channel, _ = th.SystemAdminClient.CreateChannel(channel)
 
 	channelScheme := &model.Scheme{
-		Name:        "Name",
+		DisplayName: "DisplayName",
+		Name:        model.NewId(),
 		Description: "Some description",
 		Scope:       model.SCHEME_SCOPE_CHANNEL,
 	}
 	channelScheme, _ = th.SystemAdminClient.CreateScheme(channelScheme)
 	teamScheme := &model.Scheme{
-		Name:        "Name",
+		DisplayName: "DisplayName",
+		Name:        model.NewId(),
 		Description: "Some description",
 		Scope:       model.SCHEME_SCOPE_TEAM,
 	}