sql: skip more trivial DDL for schema_locked

Previously, we would enforce schema_locked unecessarily for both zone
config modifications and visibility changes on indexes. Since neither of
these things imapct CDC, we can safely ignore these operations for
schema_locked. This patch adds SetZoneConfig and ALTER INDEX ...
VISIBILITY as schema_locked bypassed.

Release note: None

Author: fqazi

pkg/sql/alter_table.go

@@ -2398,8 +2398,8 @@ func (p *planner) checkSchemaChangeIsAllowed(
 				preventedBySchemaLocked = true
 			}
 		}
-	case *tree.AlterIndex, *tree.DropTable, *tree.RenameColumn, *tree.RenameIndex,
-		*tree.RenameTable, *tree.AlterTableSetSchema:
+	case *tree.AlterIndex, *tree.AlterIndexVisible, *tree.DropTable, *tree.RenameColumn,
+		*tree.RenameIndex, *tree.RenameTable, *tree.AlterTableSetSchema, *tree.SetZoneConfig:
 	default:
 		preventedBySchemaLocked = true
 	}

pkg/sql/logictest/testdata/logic_test/schema_locked

@@ -179,8 +179,8 @@ subtest zone_config
 statement ok
 ALTER TABLE ref SET (schema_locked = true);
 
-onlyif config local-mixed-25.1 local-legacy-schema-changer
-statement error pgcode 57000 schema changes are disallowed on table "ref" because it is locked
+# This statement is schema_locked bypassed.
+statement ok
 ALTER TABLE ref CONFIGURE ZONE USING num_replicas = 11;
 
 subtest end