Describe the proposal

Since we decoupling nullability from column type, we should support UpdateColumnNullability interface for user

Task list

• [Subtask] Add UpdateColumnNullability API #889
• [Subtask] Add JSON serde of UpdateColumnNullability #890
• [Subtask] Client support UpdateColumnNullability #891
• [Subtask] Iceberg catalog support change column nullability #893
• [Subtask] Hive catalog should fail change column nullability with clear message #894
• [Subtask] JDBC catalog should support update column nullability #895