refactor(auth): use collections for GlobalAccountNumber (#15830)

Co-authored-by: testinginprod <testinginprod@somewhere.idk>

x/auth/module.go

@@ -33,7 +33,7 @@ import (
 )
 
 // ConsensusVersion defines the current x/auth module consensus version.
-const ConsensusVersion = 4
+const ConsensusVersion = 5
 
 var (
 	_ module.AppModule           = AppModule{}
@@ -147,9 +147,8 @@ func (am AppModule) RegisterServices(cfg module.Configurator) {
 		panic(fmt.Sprintf("failed to migrate x/%s from version 3 to 4: %v", types.ModuleName, err))
 	}
 
-	// see migrations/v5/doc.go
-	if err := cfg.RegisterMigration(types.ModuleName, 4, func(ctx sdk.Context) error { return nil }); err != nil {
-		panic(fmt.Sprintf("failed to migrate x/%s from version 4 to 5: %v", types.ModuleName, err))
+	if err := cfg.RegisterMigration(types.ModuleName, 4, m.Migrate4To5); err != nil {
+		panic(fmt.Sprintf("failed to migrate x/%s from version 4 to 5", types.ModuleName))
 	}
 }