Start to migrate from util.OptionalBool to optional.Option[bool] (#29329)

just create transition helper and migrate two structs

services/auth/source/pam/source_authenticate.go

@@ -11,8 +11,8 @@ import (
 	"code.gitea.io/gitea/models/auth"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/auth/pam"
+	"code.gitea.io/gitea/modules/optional"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
 
 	"github.com/google/uuid"
 )
@@ -60,7 +60,7 @@ func (source *Source) Authenticate(ctx context.Context, user *user_model.User, u
 		LoginName:   userName, // This is what the user typed in
 	}
 	overwriteDefault := &user_model.CreateUserOverwriteOptions{
-		IsActive: util.OptionalBoolTrue,
+		IsActive: optional.Some(true),
 	}
 
 	if err := user_model.CreateUser(ctx, user, overwriteDefault); err != nil {